Yeah, I took a look at your team and who played how many.
And I do see your point, I am just of the opinion that if I have someone join a team I captain, I'm going to find a way to get them two matches if they are reasonably available. It is fine if a team takes the the other approach of focusing on winning instead, even if that means not everyone gets qualified for playoffs, that is just a decision the team/captain make. Neither choice is good/bad or write/wrong, just a choice that is made.
I guess I'd ask you, if you felt getting marginal players a second match was a challenge since you couldn't "hide" them without risking a team loss, would you plan to play them in playoffs if you had 4 or 5 courts and could "hide" them there? Or since you are trying to win they might not get in matches in playoffs since it is riskier there as you are playing tougher teams?
If your point is that the USTA makes it hard to compete to win and have a roster that has weaker players on it, I'll admit that is true. Even if you were able to "hide" the players in the regular season and get them qualified though, at some point to keep winning against stronger opponents you can't keep hiding weaker players and have to stop playing them lest you risk a loss. Is that something you would do? Or would you still aim to get all the players in matches and you just need more courts to do so while diminishing the risk of a loss?
Also, even 18+ and 40+ teams often end up with ineligible players. Those teams just sometimes have larger rosters because they need more players for the 4 or 5 courts, but not everyone gets in enough matches to qualify.