I'm not sure I agree with that estimation, but even then I'd say that the majority of Green Party voters who would decide to vote anyways would probably vote Dem over GOP, and that still matters.
Because only one of those parties is trying to deny me basic human rights, I can't say I'm sympathetic to anyone who would choose not to vote out of spite just because they don't personally have as much at stake.
Neither Dems nor the GOP did the first one, Dems did fail to ever codify the right to privacy or bodily autonomy though, despite every legal scholar for 50 years saying roe was a Shakey decision.
The second one never happened, unless you're confused by just the general existence of the FCC with your half remembered fantasy, and yes, I do remember when Dems fully supported banning travellers based on nationality, Biden cowrote that bill.