Fair is scratch, should the Colts give the Browns 14 points before they even start? If handicap was fair, there should be handicap in the PBA, PGA, NBA, etc...
Handicap is not about fairness, it's about tilting the tables so that less deserving teams can win more often at the expense of the better teams and bowlers. The argument for handicap is basically saying the best team shouldn't win.
That being said, IMO, 100% is blatently unfair to the better bowlers and teams. If you work hard and develop a good game, you should have an advantage over the bowler who doesn't put forth the effort. People work hard in life to get ahead, and derseve to get ahead. 90% is a tolerable compromise, it gives a slight advantage to the better bowlers, but it's in no way fair. 80-85% gives enough of an advantage that the better bowlers don't feel slighted, and the weaker teams still have a legit shot to win if they bowl well.
Like it or not, the best teams should win more often, that's the whole point of being the best. I don't say that because I bowl on the best team, I don't, not by a longshot. However, when the best team in the league has to struggle to stay in the top 10 of a 90% league, and none of the top 4 teams finish in the top 5, there is a major issue.