It's hard to have a rational conversation when you've set it up in such a way that one side is evil and the other is the pinnacle of goodness. And yes...that is exactly what you're doing. Your lack of nuance is causing you to take a larger political opinion you have and apply it ham-handedily to a situation that is really weird relative to other labor disputes.
Firstly....yes, the players often invoke the fans. Here. Here. Here. Basically every single time they respond to the league. So right away you are painfully wrong, made an assumption about your precious white knights, and predicated your whole argument around that falsehood. It's kinda the theme here. So I'm going to reiterate my obviously correct statement: both sides are trying to win over fan sentiment. Right now, based on the data we have, the owners are closer on that issue than the players are. The players are going to need to improve their PR on this or risk it being leveraged against them at the bargaining table.
This stubbornly simplistic view is why you don't see how the cap and floor work together as assurance for an agreement on revenue sharing. Essentially...you don't want to. You aren't considering the situation with any fairness or depth here. "Me say one side bad guy! Bad guy bad!" is kinda what we're dealing with here.
I'll give you an example, this time of "Me say one side good guy! Good guy good!" and try to argue the union looks out for the 1200 members. Explain to me how you can say that with a straight face while MLB players are essentially indentured servants until they're 30 on, BY FAR, the worst CBA for drafted players in all of sports? If they cared about their 1200 members, you'd think their top priority the last 30 years would be making sure the one thing ALL OF THEIR MEMBERS GO THROUGH, would be the compensation piece they want right. Instead? They care more about a concept that only a very small share of their membership ever gets to enjoy. Let Ryan Kreidler and thousands like him suffer....Mr. Boras has that sweet, sweet Joe Ryan money to worry about. The union's arguments don't do squat for Matt Wallner, Matt Wallbeck, or any other rando Matts that teams have exploited for their prime years at pennies on the dollar. They've never made that their argument.
Can we be less simplistic about this? Otherwise, what's the point?