That use to be the way it was back in the day, non-title fights were judged just by the ref, title fights would have 2 judges and the ref would be the third.
Domestic level fights in the UK (at least in certain areas of the UK) still are judges solely by the ref. When the final bell rings, he will immediately raise the hand of the winner. Then after a few minutes of adding up his score he will give his card to the announcer/MC to read the official score to the audience.
Most of the losers on here wouldnt want to fix the judging system, as it can benefit their fighters Like Canelo and Ward, and they will brag about a false victory afterwards.