Film crews can be pretty destructive.
This is about people wanting what is happening on the island to be transparent, like it should be.
"Are you kidding me?"
No.
" Several weeks for an impact assessment?"
Yes.
" Does that strike anyone else as a bit over the top?"
Not really. OTOH, I know what is involved in an impact assessment, where you clearly do not.
I will note that I've never been to this island. So maybe there is some geological reason you are aware of when you where surveying the island...?
He is an expert in the species, and wants to be sure their disturbance is a minimal one.
ob. Star Wars joke:
Bleep, booop beedadbee blooeeeuuup.
That really cracked them up in the droid factory.