There's no reason ethical vegans wouldn't go for ultra-processed foods. Beyond Meat just isn't a great option, it's expensive and not good enough to justify it. The selling point for them seems to be that they taste more like meat than most meat substitutes but as someone who has been vegan for a while that doesn't matter to me (unless I'm trying to match a non-vegan recipe). I get Morningstar Farms products vastly more often than Beyond Meat ones. Beyond and Impossible are maybe like my 4th and 5th most bought meat imitation brands and it's not like those other brands are less salty or processed. Idk why I only ever hear non-vegans mention Beyond and Impossible.