Long story short. If you are able to skip the cutscenes, then the over inflated exp would be dropped. You wouldnt get it, and thats what the most of you want, the over inflated exp but dont want to spend the time that the exp was compensating for.
You aren't required to do it, and if your argument is that the exp is so good you would be stupid to ignore it, remember that you are being compensated for that time spent with said exp.
Another thing to note, since people have brought up old content no one plays in WoW, the reason the roulette is even in place is so people who havent done said content has a chance to do them and you are being compensated in exp and tomes and what.