He was 100% aware of the discourse over it. Again to confirm, he said himself that he didn't ask the question because he wouldn't get an answer out of Yoshida on it. However yes, he isn't a regular healer and as such, he didn't appear to see the extent of the problem beyond 'it's there'.
Of course, we could turn to an FFXIV influencer that's a long time healer main, except of course we don't have one because SE knows precisely how badly that would go despite there being a number of actually pretty good candidates like Momo.