It's just as impossible to enact reform through the Democratic party. Especially when you adopt the approach of "vote blue no matter who." The Democratic parties interests in terms of voting reform are directly contrary to the interests of voters, and will never allow it happen unless they have no other choice. If they know they can count on your support no matter, then you have forfeited whatever negotiating power you've managed to accrue.

To the extent that electoralism is worth engaging with, strategic voting as part of a bloc is the only way to make it worthwhile. The goal should be to build an organization or movement that can say, if you refuse to give into our demands, we will not vote for you and you will lose. In the short term, it might mean losing an election, but if you can demonstrate that power, then in the future you'll be able to make a credible threat of withholding votes to get what you want, and if they cooperate you won't have to follow through. If that organization is able to coordinate other actions like strikes, then all the better.

It's like this: two countries are facing a powerful invader, and the only way to fend them off is through an alliance. But country A says, "I know you need us to survive, so we demand 99% of your territory in exchange for an alliance." If country B follows the ideology of "lesser evilism," they'll agree to that, because 1% is better than 0%. But how did that happen, when country A needs the alliance just as much? Because lesser evilism is stupid and irrational. At some point you have to set a red line and say, this is the absolute minimum that I'll accept, and I'll reject anything less even if it means the deal falling through and me facing a worse outcome. And "no genocide" is decidedly inside of that line.