If a person actually has conservative principles but is constantly telling others stuff like "It's over, it's hopeless, they'll win, get used to it" - they're as bad as that coward in "Saving Private Ryan" who refused to deliver the ammo and caused so many deaths. Cowards can go to hell, as far as I'm concerned.
And those who are not the cowards with supposed principles are just regular leftists (aka "pragmatists" and "realists" - btw, so well described in "Screwtape" and "That Hideous Strength") who want to instill fear and defeatism in conservatives so their side can win.
It's that simple. Read my tagline by C.S.Lewis. He was right.
We have a process of judicial review. Once that process plays out to its final conclusion - a decision by the Supreme Court, there is (usually) only one way to remedy it - a constitutional amendment.
Given a sober analysis of the political landscape, and an competent understanding of the amendment process, it's not reasonable to conclude that there is the political will in this country to propose and ratify such an amendment.
Moreover, when looking at attitudes on this issue in varying demographics, but especially the youthful demographics, it's pretty clear that support for this issue will increase over time, not decrease - at least in the foreseeable future - the next 30-40 years. Is it possible that sometime in the distant future, attitudes will change again? Sure. But the immediate future is easy to predict.
It's not cowardice to acknowledge and understand reality, no matter how objectionable that reality may be.