If the right never wins, they move further left to correct more centrist votes

That would be the theory, but it doesn’t seem to actually play out in practice. Look at the UK, where worsening performance in recent elections and drastically worse polling at present is leading to their right wing doubling down and being upset that their leader’s policies aren’t right-wing enough.

Or Australia, where at the last election our right-wing had its moderates absolutely wiped out by even more moderate independents (and in some cases, by proper progressives). There are no prominent moderates left in their parliamentary party. As a result, the people who are left are the right wing of the party, and they have selected as their leader a rabid tough-line conservative.