It's quite simple.
Almost all clubs throughout the nearly 40 years that I've been watching football have had a designated penalty taker.
It is abnormal not to have a designated penalty taker.
You must surely have noticed this, unless you've never watched football before.
The only two reasons you would change your designated penalty taker would be (a) if there was a pre-match agreement, which Solskajer confirmed that there wasn't.
Or (b) if a certain player has had a bad run, which, in this case, was the complete opposite of what occurred. Pogba insisted on taking the penalty, because according to Solskjaer he felt confident, despite the fact that he had a poor record, and then missed it.
As soon as you don't have a designated penalty taker, which is decided before the game, you open your players, manager, team and club up to confusion and controversy, particularly if you let the players decide on the field of play who is going to take penalties, based on who feels confident.
The underlined is exactly what the manager has stated is the current policy of the club.
So this is either an absolutely stupid policy. Or Solksjaer is covering for Pogba because he has no authority over him. Or both.
Alternatively, if Rashford demanded to take the penalty against Chelsea, when Pogba was the designated penalty taker, then this was completely wrong.
But it seems far more likely that Rashford was always intended to take any penalty awarded against Chelsea because he, you know, scores them.
And then once he's scored, it would then make far more sense for him to take penalties going forward, rather than to revert to someone who misses them.
However, regardless of this, it's neither normal nor healthy to have an ongoing debate over who takes penalties, and for it to be decided on the field of play, by the players, on the basis of who feels confident, particularly when it's a really important penalty that proved decisive in the match.
This is not a revelation, or some sort of controversial view that needs to be tested in court. It's literally the bleeding obvious.
That's why absolutely everyone in the media, whose job it is to give their professional opinion on football, agrees with me.
I can't make it any clearer for you than that.