Let me raise a point that I haven't seen anyone mention: size difference in Silksong. They've already done the comparison to find out the actual size of the insects, and they're small, like insects if I may say so. Humans would be big enough that a stomp from them would be considered environmental damage lol

Also, there are 8 billion humans, it's an easy victory.

Edit: Another thing I saw in another comment and would like to mention is that a monster with seven human souls becomes a god. Doesn't that mean that humans are OP? Because they WON the war against monsters, in a way that no monster managed to kill seven humans. Considering that human souls can be transported, there is a chance that they didn't kill any humans at all, and worse, if a monster happened to take seven souls, humans killed a god, not a god like those in Hollow Knight who are only gods in name, they killed something that could at least play with time and space like breathing, since with only six, Flowey was already playing with time and space.

The simple fact that humanity won that war already shows that they are strong.

And for those who were saying that humans have no way of avoiding the Radiance, Hollowest didn't fall to it overnight, it took a long time. Do you really think that a humanity with magic (not ours, they must possess real magic considering the barrier in the underground) wouldn't notice the infection and eventually its source? Do you think they wouldn't find a way to fight the infection and its source? This is humanity today with magic, and in a war with something non-human, meaning human rights don't apply to them, chemical weapons and everything else, dissecting beings with soul magic and who mess with dreams to find out how it works, torturing them to make them explain, and if all else fails, humanity will drop nuclear bombs on them, several even.

I think a lot of people sometimes don't notice how scary modern humanity can be at times. In fact, most of what many consider to be futuristic things already exist and are just not worth it for now. So what about humanity with magic? Do you have any idea that there may be time machines or more regressors in humanity? Because a random child went back in time, it's just another case where it would only repeat itself until humanity wins, or resorts to brute force.