Hot take: 26 year olds should not fuck 19 year olds.
It's not illegal, but it's still weird, creepy and potentially harmful and no amount of lambasting about "the problematic age gap discourse" will make it not true.
I mean, power dynamics are something that needs to be considered to make a healthy relationship, but all relationships have power dynamics. I mean, the power dynamics between men and women in general is likely more intense than the specific gap that of a 26 year old and a 19 year old.
I know, and I can see the logic. Still, I hope that straight people can have consensual sex, because the alternative would seem to make humanity irredeemable.
In this case, I believe they're referring to the radfem idea that all heterosexual sex is wrong and that being a lesbian is as much a moral/political choice as a sexuality. Some, but not all, of these people are also TERFS.