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I propose to have 2 profiles, the first a professional one with portfolio of projects, blog, articles and what's not and the second for your private views (nobody should track that profile to your person using publicly available information).As someone involved with online privacy&security for a long time... I think almost no one on HN (including myself) can keep multiple online personae unlinked by commercial data brokers for as long as the threat model would seem to require.
If you have alt accounts, consider them low-security that eventually will be revealed, and figured into many employers' data science ranking&filtering, and their AI-model-summarized profiles they can pull up on you. Ideally, it won't be revealed before there's a more enlightened US culture of social tolerance, and more comprehensive and serious US data protection laws, but you can't bet on that.
You might also want to simplify by minimizing use of alts, and instead trying to self-moderate how you put yourself out there. For example, if you voted for a political candidate who rubs a lot of people the wrong way, either own it, or don't rant about it with alts in online public forums. For another example, dating -- without data brokers spying on some of your most intimate private interactions -- is nigh-impossible, but with an awareness of this, you can still try to save some things for offline pillow talk only.
When I created an HN account, I knew I'm more liberal/progressive than a lot of tech people, and that there's some currently popular practices in the field that I'm inevitably going to be outspokenly critical of, and that's going to alienate some techbros and employers. Having my name on the account is partly a reminder to me to try to only say things that I'd be willing to stand behind. (I'm certainly not perfect, but it's an attempt, and always learning from it.)