We don’t know if he wanted him to turn it down because of the job itself or because of the guy he did the shoot with. Unless it’s explicitly stated, we won’t know the actual reason behind his words.
Hell, he might actually quit and find something else, but if he doesn’t and his partner doesn’t have a problem with his choices, then that’s his choice. There’s no need to demonize sex work or being a porn star, it’s literally a job some people do and still have successful relationships. They’re still people at the end of the day, Jesus fucking Christ.
Maybe for you it's not. But for many people sex is intimate and shouldn't be done with anybody else but your current partner if you're in a relationship with them. Even if you call it a job. You're saying that if your partner told you s/he wants to make some money so they'll make a sex tape with someone else you won't feel bad at all? And just say "okay honey, have fun and make the money"?
I guess it's different for everybody, but I'd be fine if my partner went into the sex work. I've always lived in a poor town where it's common and considered among many because how else are we supposed to live? If I had to choose between getting fucked or dying and watching everyone I know and love start to fall apart because we couldn't pay the bills I'd just go into the sex business. Some people aren't privledged enough to do anything else, especially in this economy and low acceptance rate for jobs.
regardless, it still is a job? he was aware of the job kaede had the whole time, and if he truly didn’t enjoy it then he would’ve told kaede. sex is intimate to some, but for others it’s not, and that’s okay. a lot of sex workers do treat it as a professional job, as many of them are just acting the part. they know the difference between intimate sex with a partner and a job that they have to act for so that they get paid. i’d be fine if my partner did sex work since i have enough trust in them, and know that sex isn’t always intimate. he might’ve not liked being in the room with kaede (which is fine) but we literallt don’t know if kaede would quit his job or continue it. regardless, if they both care about each other and support each other there shouldn’t be an issue

As much as I admire his work it still left me speechless when he still continued fucking with the hot dude like- im shocked and confused? idk what to say but that was really new