I wasn't invalidating it any more than they were invalidating my opinion that facebook isn't the devil with their response to telling me that is the dealbreaker. "It's that simple".

Note this wasn't the poster I initially asked the question of. It was someone else just coming in and trying to tell me "it's that simple". My reply was not whataboutism, it was explaining why it's not "that simple".

And it wasn't a rhetorical question, I really want to know, from someone who does have this very simple "line", whether it's okay to use Apple or Google or Facebook services or products, whether it's okay to work for companies whose owners or executives own stock? Whether it's okay to vote for politicians who take money from them or who themselves own the stock?

This isn't whataboutism, it is exploring the consequences of this moral position.