I want to reach the highest handicap I can. For a while I was the top rated player in my league, right after I joined and for a few matches afterwards, felt pretty cool.
The flipside to that, is that you will be playing people as good as you that just want to play good enough to win but are careful not to play so good as to go up or just plain manage the games against what they need to do to advance and keep the handicap as low as possible. If their team already won for the night, they'd slack off to pad the misses and losses.
That's the real issue with handicaps, you do not always play people that are ranked what they should be. If they are fair, no issues with them at all, and I don't think it keeps people from getting better. Many players if they had to play even vs. a good player just quit playing. I see it all the time in tournaments, someone shows up with a great idea to play, they come up against a bunch of B players, lose every game and are never seen again. If they only had to win 2 games to 4 they may win a few here and there and are likely to return, and maybe would be interested enough to get better.
I doubt many players would be happy being ranked low rather than improve and go up. Some just start out playing for a long time with bad fundamentals and have a very hard time playing well, which would block them from improving due to how much work it would take to rebuild the game to the point where they can go up. You will only reach so high of a level just shooing for years, you need to learn the shots and how to properly shoot.