If its not so bad, then why is your literal job to train people how to get through it? If it were easy to ignore, then people wouldn't need training, no?

It’s not a fun experience, but again it will not stop a determined aggressor. It will deter someone who isn’t all that invested in whatever, but it won’t physically stop them.

The training is literally just exposure training- we have them hit each other with OC spray and then the person who got sprayed gets to work through cuffing the other up. (They trade off.) the reason for this is two things-

1. if you use OC or any other kind of spray, you will be exposed.
2. it teaches you that *it isn’t that bad and you can still function.

By temporarily blinding them and basically lighting their face on fire, obviously

Incorrect. It doesn’t technically blind anyone. OC is a chemical agent that triggers thermal receptors to create a burning sensations. When it gets in the eye, the body responds by flushing the eye- making you cry.

Again this is not something that incapacitates- any one who’s been exposed can and will remain a threat, same as anyone who is on something or just angry enough or desperate enough.

This is why no cop in the world engages someone with lethal weapons with mace.