It's exactly the same logic. You can't just take your own set of issues, say you're obviously right about everything, and then factor out everybody else's big issues. If you make a consequentialist argument for murdering insurance executives, other people do in fact get to use the same moral logic to stop things you disagree with them about, like gender-affirming care and abortion.

If we throw up our hands and accept that each individual can be the judge of injustice, and execute whatever retribution they see fit, these individuals also meet that criteria.

By abandoning democratic law, you also abandon 3rd party discretion and control over which injustices are legitimate.