I totally agree. Coincidentally my son keeps some isopods as a sort of hobby in a terrarium, and yeah, I do find it hard to see them as quite the same.

Your latter point is a very important one. I think of intelligence as a very tenuous, fragile thing. We can barely utilize it the ways we intend to, and it isn't a guard-rail against all kinds of bad behaviour. It's almost useless to us in all kinds of common scenarios, or barely accessible. We get enraged, drunk, turned on, depressed, etc. and suddenly these faculties are barely function in the ways we need them to be.

So, it becomes much easier to forgive people for making mistakes. You begin to realize we're holding onto this potential by a thread most of the time, not wielding it like a trusted tool. The more you observe this, the more it's a wonder anything works at all.