Gramps, I applaud you for being so frank. You are quite right some couples do have vastly different sexual needs and if DIY solves the problem that must be better than looking elsewhere. It seems to me that some women think that pornography is a replacement for their love and affection, men do not see it that way, it is totally different, just a physical requirement.
When we talk about pornography, there are many levels of it, from the downright perverse and unpleasant (and illegal ) to that which is equivalent to the top shelf mags. I personally see no problem with the legal sites, I'm sure the participants, men and women are paid for their efforts and do so of their own free will.
We seem to be assuming that these sites are run by men, why, I'm sure that their are women running some of them.