I understand. But my point is that in the end, there is always room for error. Trials are too susceptible to bad days or one time issues etc. Arguments for adding judgement into selection have benefits and negatives just like trials do. The fact that people make selections doesn't inherently politicize the process unless the argument is that those selected have zero merit, which is not a case that can be made without looking at those selected.
Now in Japan, even though the selection criteria are clear, people are complaining that Hina Hayata did not make the team.
The thing is the coaches have a job to look at what is in the best interests of the team and the country both short and long term. Taking a trials based approach is fair in one sense but is not necessarily aligned with the best path for developing table tennis in America.
In fact, politicization of selection can go both ways. Requiring people to compete in trials when they are clearly the best players can alienate them if the trials are mostly a waste of their time, though they can be given the incentive of helping develop and expose local talent. In the end, it is about flexibility to manage the team. It doesn't always lead to the best results but neither do trials. But I guess it is easier to win an argument if you pretend the other side is inherently wrong.
I understand your view point of coaches looking at long term.
I guess this is where if you have a team of 5, then coach can control the team by 1 or 2 of them.
For majority, then i would say coach has too much power.
I think USA is not blessed like some countries and to give power to a small amount of people to a small amount of players is not good at all. This trials is a joke with the limited attendance (I believe this is the lowest amount in years right?).
USA is very weak in TT and is busy on the increase.
USATT has a very young team and has a very lower average age for a long time.
Talking about long term plan and age - USA has been doing fine on this for years.
So the change of the "rules" is not because USA is an oldise team, and they want a younger team for the future.
I can agree with you if the team is full of oldies and they want to have x number youngsters and force the coach to have decision for this
Overall, no matter what way you look at it, there will be facts and support and the other side you will have facts and resistant.
I would have open card policy - have the rules stated out in advance (not 2 months, but 12 months) so players can plan and compete equally and fairly.
If they get injured - that is part of life (same with any sporting code).
My 5 entry will be
1 x spot via national champion
1 x spot via trials 1
1 x spot via trials 2
1 x spot via wild card
1 x spot via wild card 2, or development player (by USA is full of youngsters, so this U21/U18 player is not really needing a wild card spot)