Straight porn by content alone is definitely not entirely "Straight" unless it's litro a male's pov of the women, you're seeing dick the majority of the time and it isn't your own.
I really cannot agree with this. Like I said in a previous comment, "lesbian porn is the only straight porn" is an absurd claim, and it's not that hard to figure out why regular straight porn, with both male and female actors, is consumed. Broadly, the main two reasons are:
1) projecting onto the male character/actor in a fantasy scenario (some common ones off the top of my head are stuff like fantasy boss/secretary, stepfamily, etc.), realizing personal aspirations in appearance and status through them (influential, muscular, tall, big dick, etc.) or, conversely, the actors having a more relatable appearance and being just like them (short, skinny, nerdy, etc, for example) while still being desired by every woman around,
2) seeing the woman/women satisfied through sex (and/or any other fantasy, fetishy scenario that involves a woman),
and it's not about actually looking at and jerking off to penises (unless you are actually gay and you are specifically watching straight porn to ogle the guys).
Do you also apply this logic to romance novels/erotica with female leads? "You're reading about another woman getting fingered? What are you, a lesbian?" Or, more notably, the many straight women over the years who have talked about exclusively watching lesbian porn because straight porn is almost always filmed for men and from the male POV?
much like how people think traps and futa aren't gay...
Trans women are a pretty big fetish for straight guys, yes, to the point of there being a very controversial community of chasers. Conversely, trans women don't have any presence in gay porn/erotica because, unsurprisingly, gay men are not interested in women.
Femboys/traps is basically an extension of this; I assume that the identifying as a male makes it a bit more of a taboo/thrill, but it doesn't really change much, the idea is still that they are basically a woman/extremely feminine and that's where the main appeal lies. And, once again, this is not a relevant fetish for gay men.