Dream on.
How many ex professional footballers will go on to be referees. There is a limited supply of people willing to do the job, the vast majority of which haven't played to any high level of football. Unfortunately, the quality of those doing the job is getting lower and lower.
She made an error but if you want to blame anyone, blame the FA for not having VAR for all the quarter finals. Nothing about 'championship' clubs installing it, just need tv cameras at various angles (not sure what some people think VAR is!!!). There were plenty of cameras at the game so VAR...