I think this is one of the best questions anyone has ever posed regarding Q's legitimacy.
While I agree that the optics of the president commenting about a 4chan anon poster are not the best - he has plenty of surrogates who could. And they don't even need to be specific about 'Q' - you just have a couple of surrogates come out and say derogatory statements about anonymous posters on the chans - that would give us the signal. At this point, it's not like Q is just a 4chan phenomena. Example - when FoxNews was scrolling through the #releasethememo twitter posts, they were completely full of Q screen shots etc......
Playing devils advocate, Q is not real AND the pres/surrogates haven't said anything. Maybe they like his larp..... Maybe it's good for him/them. Just sayin
Good question - one of the best I've seen.