While I believe the individual reasoning of most Democratic voters is flawed or inadequately nuanced, the reasoning does exist to much greater extent than the R cult.
Far more important is that the typical Democratic voter's reasoning is now rooted in a sincere intent to choose what they believe is best for both themselves and anonymous others. The R cult correctly estimated the D cult's propaganda: It alone couldn't survive a change of candidate. The fact that the vast majority of Democratic voters would stay rooted in ideology never even occured to them.
Well done, average Democratic voter. If you want to stay engaged through midterms and the next cycle then know that the Green Party wet dream would be forced internal elections 2025 due to scaling. Take them over and they'll welcome it. There's very little national or state control over local chapters. They've a head start on local ballot access, legislative initiatives, communication of basic platform, logos, etc.
Winning a federal race doesn't matter to people I've met there. The Green Party itself would be readily sacrificed for national RCV. But, the wet dream is definitely that enough people engage to attract a candidate of the quality of Sanders in his prime, then scale exponentially to break two-party dichotomy.
Fuck party loyalty. Use them as a tool when it makes sense to do so. Volunteer as a Democrat to work the polls. Always stay loyal to your principles, just as you've done now. Learn about the means of elections and seize control of them.