You’ll never get purity. The only person you’ll agree with 100% of the time is yourself.
Most accept that. There will never be a perfect candidate or one that the masses will agree with 100%. The problem with RINOs is it isn’t just one issue, nor two. Its a complete abandonment of core conservative principles under the guise of an (R) behind the name.
You can't even count on that. I know conscientious lawmakers who regret votes they took and I bet you'd be hard pressed to find lawmakers who don't have regrets about certain votes.
That's why this chase for purity is futile.