And not being punished for such by the league.
The agreement that both parties signed stated this:
"It is a privilege to be part of the National Football League. Everyone who is part of the league must refrain from “conduct detrimental to the integrity of and public confidence in” the NFL. This includes owners, coaches, players, other team employees, game officials, and employees of the league office, NFL Films, NFL Network, or any other NFL business."
The argument the NFLPA will eventually make is that the league as reneged on the "Everyone" and "Owners" part of the agreement. Therefore, losing standing to discipline players. It's a pretty strong argument, IMO.
I do not think the players will fight an 8 game suspension for Watson. It's not a good look. I absolutely believe the players will demand a lawsuit against the league if the result is an indefinite suspension at the discretion of the commissioner. An indefinite suspension for a player who was not convicted, or even stood trial, of an offense would be enormous escalation of power to the league. Something they just fought against in the last CBA. All the while the owners get away with anything and everything, scot-free. That's why the "Everyone" and "Owners" language was put in the agreement in the first place.
I won't childishly admonish you for not comprehending this. It's difficult. Reading is knowledge.