Amorim has set a motivating goal in his own way. It doesn't seem easy for Manchester United to score 10 goals right now, they are pretty bad at scoring goals. Osimhen was talked about a lot for a striker transfer. If they transfer Osimhen, then they can easily increase their goal ratio next season.
I mean, doesn't the problem of a lack of goals come from the fact that they decided not to buy a striker this season? I'm not sure if it will be as easy as transferring expensive players and suddenly they score 30 goals for them, considering how many players play pretty badly for Manchester United. Maybe things will be different with experienced players, who knows.
I can see why he said there are other priorities, though. I believe the goal of this season is to filter which players suit his strategy for next season, hence why the gameplan is quite similar, even though they literally can't score goals, keep conceding goals, etc. They're fighting for nothing in the EPL, so they probably think the pain is nothing if it can help filter the players. Obviously, this is a gamble because clubs know Manchester United is in an urgent need of new players next season and can push the price if they're smart with negotiations. CMIIW.