Where is the misunderstanding? Currently, boosting is not a problem. If spar hats return, more players actively spar. If more players actively spar, it is more difficult for players to pause and give themselves free wins in 1 of 4 active spar rooms. If it does happen, they get reported.
???

Not to mention, is it so difficult for an administrator to create a system where RC is alerted if a player beats the same player 3 times in a row without getting hit? 5 times in a row with getting hit? Just completely not count any further wins if a player beats the same player 10 times in a row? It's not rocket science.