It’s not as though those are the only choices.
Conservatives need only 15 to 40 (depending on one’s preferences) more members in the House to take it over using the GOP caucus.
(Hence this RINO desperation that POLITICO is spinning)
No other option is so appealing.
Third-party conservatives are fine too. If we can’t run one, run the other. Heck, in moderate/conservative districts run them against Dems and RINOs both.