Because you could shoot when doing that and shooting backwards is weird. Meanwhile you can't do anything while hanging. And if we allow turning around and only allow shooting up to a certain degree, it would feel weird when trying to shoot but being unable shoot and then having to figure out at which degree you can still shoot imo.
I'll reduce the knockback and also decrease Ant's HP a bit.
I'm imagining it could be fun to have a mod where all players are small so every map becomes like the office.. Hmm..