He shouldn't reply, even if unfair, full stop.
Yes Licha has been receiving shyte (not only from Scholes) since the very first minute he arrived to the EPL and I guess this last injury doesn't precisly have him in the best of spirits, I guess he got finally tired.
He could just answered like he normally does and this time maybe a bit of irony, sarcasm saying sthg in the line of: "thank you former United legends for the support with my new injury", that way he would have exposed Scholes out of touch comment (BTW has been quite obnoxious since time).
PD1: he treated Scholes as a "mufa", as someone that brings "bad luck", more than probably because of two reaons: his recent too many comments about him and later him getting injured and because he is a ginger. Gingers were always called out as being bad luck.
The last part of Scholes not surviving in Argentina, I don't have a clue why he said that, maybe because Scholes said EPL was too tough for him? or just an unnecessary reiterative pun because Scholes is "bad omen ginger", in any case this style of response it's pretty unnecesary.
PD2: Side Note: I was talking about in another therad, how former players seem to forget how much they hated the trolling from the Press, the over the top opinions, etc., the comnstnat comparison with themselves and they are almost always reactive in their opinions, I think it was in the Erling Thread.