LOL. It's like saying that we found a piece of the door frame of the RMS Titanic, therefore the movie Titanic is true. Or if I find a large footprint-shaped impression in the ground, that's proof Bigfoot exists.
Which is to say, that isn't how proof works. To "prove" something, you have to account for all the other possible explanations, and why they are either untrue or less likely. Than what is, let's face it, literal magic. Have the items been dated? Have they identified their origin? How did they figure out how long they've been down there? Where are the rest of the parts? What are they the parts to? Why did they survive? Shouldn't there be more of them for the story?
Even Jewish scholars say the Exodus didn't happen.
Most mainstream scholars do not accept the biblical Exodus account as history for a number of reasons.
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The Book of Numbers further states that the number of Israelite males aged 20 years and older in the desert during the wandering were 603,550, including 22,273 first-borns, which modern estimates put at 2.5-3 million total Israelites, a number that could not be supported by the Sinai Desert through natural means. The geography is vague with regions such as Goshen unidentified, and there are internal problems with dating in the Pentateuch. No modern attempt to identify an historical Egyptian prototype for Moses has found wide acceptance, and no period in Egyptian history matches the biblical accounts of the Exodus.
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While ancient Egyptian texts from the New Kingdom mention "Asiatics" living in Egypt as slaves and workers, these people cannot be securely connected to the Israelites, and no contemporary Egyptian text mentions a large-scale exodus of slaves like that described in the Bible.
The reasons include that there would have been 2,000,000 Israelites wandering around a patch of land that you can walk across in a week, which would have also meant that, walking 10 abreast (200,000 rows of people) with a comfortable walking distance between each row (e.g. 2m), those at the head of the procession would have reached beyond the halfway point before the last people departed (2,000,000 people / 10 abreast x 2m row spacing = 400,000m = 400km).
Egypt losing 2,000,000 residents, including a slave workforce of at least 600,000 (if we count only males), would have been recorded somewhere, and would have dramatically affected the economics, the social dynamics and other factors of the area. Nobody seems to have noticed. And Egypt was notorious for its record keeping, even the unsavory parts.
As with the myth of the flood, it's possible some small-scale event was the origin of this myth. Localized flooding can easily be mythologized up into a global flood that killed everybody... except the Chinese, Aztecs, Australian Aborigines, Native Americans, tribes of Africa, etc, etc, who never noticed they were all apparently drowned but never knew it.
Despite the absence of any archaeological evidence, most scholars nonetheless hold the view that the Exodus probably has some sort of historical basis, with Kenton Sparks referring to it as "mythologized history". Scholars posit that a small group of people of Egyptian origin may have joined the early Israelites, and then contributed their own Egyptian Exodus story to all of Israel.
So, we can accept that an exodus occurred, while rejecting the notion that The Exodus, as described in the bible, actually occurred.
Anyone wishing to propose this discovery is proof of the bible will need to disprove more mundane explanations.
Because the Exodus describes specific magical events. There's a very long distance between the mundane story of three dozen Egyptian outcasts leaving town and joining the Israelites, and the magical epic saga of plagues, death of the firstborn, two million people walking across the desert for 40 years, magical, physics-defying fluid dynamics, and all the other shenanigans that is the Exodus mythology of the bible.
As someone once pointed out, even the characters in Exodus act like they live in a storybook land. The Pharaoh is just like, sure, we live in a land where magic is real and I have people who work for me who can do it. The Israelites are like, sure, a divine being from on high freed us with his hand and held back the waters of the sea, but we're going to worship this golden calf we made because we live in a world where magic and gods are everywhere, so that kind of shit isn't going to impress us into thinking a single uniquely divine creature exists, because why would we?
