He gave the press an easy talking point to pile onto Amorim
You've already seen it in the prematch press conference against Spurs, pretty much every single question is about about Rashford and Amorim is visibly annoyed about this too.
For now, Amorim has managed to brilliantly answer them as diplomatically as possible. But it won't stop, you just know the questions will keep coming in all of our upcoming games.
If I'm being cynical, I think that's exactly what Rashford is after. He does not have the best interest of the club at heart, in fact I'd go as far to say he is actively trying to sabotage the team's harmony
If I was INEOS, I'd get the press officer to ban all questions pertaining to Rashford and freeze Rashford out of the squad Sancho/Ronaldo style then fecked him off the moment the January window opens. This is the type of dressing room virus Mourinho was talking about.