So much like NCAA Men playing two halves and everywhere else in the world basketball is played in 4 quarters, the NCAA is heck bent on being different? I can't think of a single other place from rec league to pro league that would impose a limit of how many teams you can play on in a given timeframe.
You can't compare rec-league & pro league to college.... I'm sorry you just can't.
Rec league people bounce around because some people just play for the love of the game & others wanna be on the best teams & win.
I'll use myself as an example..... I played rec league baseball & basketball.... I was far from the best at either..... I just played for my love of the game & to make to friends & have a good time. Sure I was competitive & wanted to win.... but I wasn't out here dreaming of being a college or pro athlete.... cause I knew that wasn't in my future with the cards I was dealt.
Plus when you (or your parents) are spending money on sports as kids.... they want you to enjoy it & actually be able to play. I ultimately gave up playing rec league baseball because I was tired of riding the bench or being put in positions in the field that I didn't enjoy, just so that other, better kids could play where they wanted 24/7. Some coaches I had, were awesome & gave the lesser talented kids like myself a chance to play different positions & see where they were good at or what they enjoyed instead of just putting people places & leaving them there. Other coaches I had.... didn't give a flying f*** what players like myself wanted..... and made the game a lot less enjoyable.
I'm sorry Rec-League (not AAU or travel ball) should not be like that..... Not even remotely comparable to College Ball. NOT EVEN CLOSE.
And Pro leagues are different too for multiple reasons. For one, as a pro.... you can negotiate deals.... whether its 1 year, 4 years or 10 years. Full or Partial No Trade Clauses, and of course the money terms of the deal. If a player wants to sign nothing but 1 year deals & keep his option open, he usually can. If a player is good enough & a team wants to lock him up for a long term deal & give the player more money to keep him there longer... they can. Look at deals that players like Mike Trout, Bryce Harper, Patrick Mahomes, Aaron Judge, Nikola Jokic & others have signed in the last 5 years or so. All long term, big money deals.
Then you factor in.... if a player wants to get traded.... That team has gotta make a trade with another team & come to agreement of what that team is getting in return.
If a player wants to get released.... they gotta be willing to give up money on their contract.... and if the Coach/GM wants to release a player... depending on how the contract is laid out.... they may owe the player part of their remaining salary.
The other major difference between Rec League/Pro league & college is..... in Rec/Pro leagues.... no one is being required to attend classes & keep their GPA above a certain level. Also, in rec/pro leagues... players aren't being given scholarships to get a free education.
Last I checked, NCAA has no trade system unlike the pros..... and most if not all athletes are not just playing for the love of the game like a lot of Rec Leagues. Coaches in College sure as he!! aint coaching like its a rec-league game. They're coaching for their living. And if players were just playing for the love of the game..... then NIL wouldn't be a thing & this free agency transfer portal issue wouldn't be as big of a deal as it is.
So I'm sorry, but the comparisons between College & other levels of sports are just not there.
College Athletics is it's own unique world..... it's the only level of sports where an athlete can get treated as a kid & a grown adult at the same time.