Yes I've met several men who've given up porn, but with very different reasons for doing so.
Some give it up because they are aware it's having an effect on their real lives, especially their sexual responses i.e an inability to orgasm through sex with a partner, erectile dysfunction; so the motive is self-protection.
Some give it up because their use of it is upsetting a partner and what was only an occasional habit isn't worth that; so the motive is partly self-protection to maintain a relationship that's important to them and partly care and love for a partner's feelings.
Some give it up because they start to find out about the porn industry and what happens within it. Once they start humanising the women who are abused in porn, they find it impossible to view it through the same lens as hitherto. So their motives are humanitarian and political.
It doesn't sound like your partner wants to give up porn or sees it as a problem. He also doesn't understand the concept of telling lies by omission. He seems to be saying it's no big deal and that you should get over yourself.
I'd have more respect for his stance if he told you directly that he doesn't see a problem with it and will continue to use porn. Instead it sounds like he's lying to you and has no intention of changing. He'll just hide it better to avoid a row. While he's got an absolute right to do what he wants, he hasn't got the right to lie to you about that.
What do you honestly think? Do you think he'll give up porn full stop?