"why do you like this?" != telling someone why they like said thing, this is basically entirely off topic
It's not optional, you see, it's a moral obligation for everybody who likes fluffy pink whatevers to "think critically about the ways that our consumption or our For You pages might be reflections of that deeply political and social world" ... this amounts to telling them, in general terms, that the reason they like the thing is political. It's a disingenuous "just asking questions" deal where the objective is to talk to them about Marx, like a JW doorstepping you to just ask you whether you've thought about Jesus.
If we revisit the original thread comment it doesn't really bring politics into this, or force people to consider their own political interests, or actually mention anything political at all!
This is very obviously your own bugbear brought into the conversation uninvited.