YES to grover not giving a fuck about the human's safety when the animals escape. that is so book grover. he spends the entire series hating on humans. no character arc no change in opinion just a goat full of hate for homo sapiens. i want more of that please
(aryan delivers this scene perfectly tho fr, his genuine disinterest in human's wellbeing, his downright cheerfulness at the chaos that the animals are causing, him basically going "well everything looks great to me!" when percy is like dude the PEOPLE???? absolute chef's kiss. dare i say, most book accurate scene in the show)
literally perfect. I love the dynamic of Grover taking on the responsibility to save the wild, and Percy taking on the responsibility to save all the people.
In all honesty, I don't think Grover would have any problem getting rid of people, the fewer people the better, he is brave and kind but mess with the wild and he will take you out. He cares about half-bloods, any of the love he has for humans comes from Percy. People matter to him because people matter to Percy.
Percy's fairly indifferent about the environment, because he's just an average teenage boy, and he's dealing with life-threatening crises every other week, he doesn't even know if he's gonna be alive long enough for a restored wild to mean anything to him at all. He cares about the wild because Grover cares about it.
The core of having best friends is finding yourself caring about something that you have never cared about before because it matters to one of the people you love most in the world.