Mostly that crowd is just concerned with humans' tendency to shoot ourselves in the foot when we don't understand something.

There used to be this place called the "fertile crescent" where humans grew a lot of food. But they didn't understand how certain irrigation techniques caused salt to build up in the soil, so they accidentally turned it into a desert.

We don't understand this oxygen source in the deep ocean. It seems likely that we're, again, about to shoot ourselves in the foot.

The belief is not that humans are evil, it's that humans are unskilled in dangerous ways and that it's worth slowing down to cultivating those skills before we cause unnecessary harm to ourselves.

This is more or less my view. However, when I say the "humans are bad" group, I mean the people basing their decisions purely on emotion or virtue and who are usually incapable of coming up with such a nuanced view. The same goes for the other extreme.

So you think certain humans are bad.

Humans aren’t bad in moderation. But 8 billion of us, and growing, consuming ever more resources, are pretty objectively bad.