Mods choices were to give up their community immediately to all the chucklefucks lining up to replace them, or to wait and see. It's naive, not traitorous. Just as naive as anyone believing that anything short of federal intervention could have stopped the IPO.
Despite reddit's ineptitude, shit like an IPO doesn't happen overnight, and there's practically nothing that can stop one if the goal is for the CEO to cash out.
Reddit also was already replacing entire mod teams on default subs, groups of 10+ people. They happily let subs go to complete shit when the new mods were terrible, and closed subs with no mods. Huge subs. They were banning mods for even suggesting moving to other sites, and restoring comments from accounts that had tried to wipe their comment histories. There's also evidence they were using GPT to run bots in support of staying.
With all the shady shit going down, Reddit would not have hesitated for a moment to replace literally every existing mod on the site. Could have hired people to do it too, at comparatively low cost.
Holding on through that is dumb, but you're an ass for calling someone a traitor because they had more investment in a space than you. You don't berate someone for staying in an abusive relationship longer than you happen to think is rational.
Save the vitriol for the corpo shits who did this, actually move the fuck on, and stop shitting on people out of your misplaced ideas of "purity". These are fucking websites man. Find some more important shit to be an ass about.