How the porn industry works might not be as mysterious as you think.
I think your view reflects your experiences, and that is also true for BA. You actually have no idea whether the people involved were coerced or abused, you can't extrapolate from what is usual to what is true in a specific, and very limited, situation.
There are people, particularly women, who have attempted to do "ethical porn," without people being pressured, without drugs involved, etc. Is it really ethical? Well that is probably going to depend a lot on what kind of sexual activity you think is generally ethical, but the point is there are people who both think porn is ok but the economic model is the problem.
Personally, if it matters, I think self-destructive sex is pretty common in the circles BA was involved in, including the sex that had nothing to do with making money, and I think self-destructive sex is unethical. - which is not to say that I think it should be illegal for people to do it.
I also think that people who are involved in self-destructive sex as a hobby have a hard time seeing the differernce between that and doing the same things for money. Does Buck Angel fall into that category - it's certainly my impression that Buck thinks so. And while that might be self-delusional I don't think it's a con.
Here is the funny thing about questioning my feminism on this issue - I run into trouble with feminists typically for my view that a lot of "hobby" sex is self-destructive, and that it's therefore unethical in the sense of being self harm or being complicit in others self harm; they typically see it as a repudiation of women's sexual autonomy and as not being sex positive enough., rather than because I think pornography is exploitative and also damaging in itself to creators and consumers. That is, feminists usually think I go too far rather than not far enough. So I am not sure you accusations that i am not being adequately feminist really land, although tbh I don't really care about that label one way or another.
Where to draw the line, legally, around pornography, isn't always straightforward, either in terms of how to balance it against personal autonomy or where we draw the line on what constitutes pornography, though again, that is a question where I'd include more under that umbrella than many others do.
You say you had a lot of respect for JB and her work around pornography. She, presumably, knows what it really involves - do you really think then that she has somehow lost her marbles and is being friendly with a monstrous person?
People are complicated. They can be blind in one area, most have struggles, all are limited by their own experiences, it can be hard for all of us to be honest with ourselves at all times. One of the things that's struck me about Buck Angel over the years is a willingness to question those things, right down to, did I really need to transition. No one gets it right all the time, even on important stuff. Harvey Weinstein and people like him notwithstanding.