Dog Groomer In Training witnessing abuse. Is this what it takes to be a groomer?

I’ve been working as a bather for three years at multiple different dog care facilities and I’ve been being mentored under two separate dog groomers on and off for two years.

The place Im at right now, I’ve talked to my mentor extensively about the experiences I’ve had working in this industry including the horrible abusive situations I’ve witnessed. I quit a job in the past due to my mentor hitting dogs with clippers, scissors, her hand, etc. My current mentor told me abuse is never okay and “all she does is spank them sometimes”

The other day, a regular comes in that I’ve never done before. He’s a corgi that my boss has wear a muzzle during the entire time he’s there because he growls and bites the entire time. She hit the dog in his head in front of me after he lunged at her and it shocked me.

Once she handed the dog off to me, she said if he gets too aggressive with you just hit him and that “calms him down” 😐 I refuse to do that so I went about brushing and bathing this dog the best I could while dodging the bites. After like 30/40 minutes, he bites me through the muzzle and my mentor takes over for me.

This is a stupid question in reality but is hitting a dog what it takes to be a dog groomer? After being lied to by her with her saying she never does stuff like that, I don’t know what to believe and I’m questioning everything. I find dog abuse disgusting obviously and I am not willing to hit a dog ever. I only work for her because I thought I was learning the best techniques because she seemed so knowledgeable.

At this point, I’m thinking about quitting because dog abuse is a deal breaker for me. I really love working with dogs but I do not have enough skill to go solo.

3/4 dog care facilities I’ve worked at abused dogs there. Why????????