If you visit most any therapist in discovering your man has a porn addiction, you will be gaslit into believing that:
a) There's nothing wrong with porn! He watches it because he's a man and that's just what men do! YOU'RE the one with the problem (maybe you have some childhood trauma we need to uncover and diagnose, lady) if you don't agree with him using pornography!
b) You need to be more "sex positive" which again, means that you not only need to agree to his porn use in the relationship but you also need to try new and "kinky" things in bed (especially all the disgusting, hurtful things you don't want to do as a woman).
c) It's okay for him to supplement the sex you're not having with him at certain times (you're at work, you're asleep, you're away on vacation) with pornography. It's not replacing your sex life entirely (not YET, that is), but he has to find relief as a man when you're not around! It's a must!
None of this helps you in the slightest. It just doesn't seem to register with the therapist that you no longer have a sex life, or the sex is really horrible, because he's watching porn.
And the real reason he seems to "prefer" watching porn over having sex with you is because...