No, it's nothing like Age 65. If pilot groups wanted to buy an Age 60 retirement in contract negotiations they could, but obviously none have. For all the hew and cry, it would never pass.
Profit sharing is never going to be handed out as a "gimmee" to labor. They will get it in lieu of book rates and its an inconsistent bargain. If you "give nothing for it" then by definition it is worthless and certainly not worth gambling on an arbitration ruling that has all downside risk (sound familiar USAPA?).
Age 65 made sense in light of pilot longevity. Congress was not going to negotiate an early retirement for pilots by retaining an outdated law. Pilot unions undermined their credibility by opposing it on the basis of safety. The water has passed under that bridge and not worth arguing over. But to draw an equivalence between Age 65 and Profit Sharing is a non sequitur.
Clearly you have yourself barricaded wholly and completely "in the box". You're no more nimble and forward thinking than how you describe your company. Make PS an item that is as far from the contract as you possibly can. Like an HR thing, or a health care personal spending account. Maneuver it into something ALL employees get. That will work better in a Texas corporation than at the other two you've worked for.
Stop thinking the union has to "buy something" from mgt, or "play a card". That is old, failed, and foolish thinking. If you were clever enough to decide 65 was a winner for you, then act the same toward other issues/items that can help ALL your fellow pilots. You owe them that much. The pendulum is moving the other way, supply and demand are lining up in our favor, time to get big changes done that help entire groups.