Thomas is not the supreme court. And he’s starting to alienate himself from even the other conservative justices. He’s on an island and I doubt the others would follow his lead if this reaches SCOTUS on appeal.
None of them went out of their way to distance themselves from his comments, either. They didn't offer any kind of dissenting opinon. They didn't speak out against his advisory opinion, which is supposed to be against SC norms. And they haven't spoken out since. And given their rulings since gaining the supermajority, along with their "nuke it and everything close to it" approach to ruling on matters, and there's no reason to believe they wouldn't gladly just go along with whatever Clarence Thomas says, or at the very least, not care enough to vote against him.
This isn't even the first time he gave an advisory opinion. Remember the literal list of cases he said he wanted to review and overturn? He wouldn't be so brazenly and openly giving these literal roadmaps of what cases to bring before them if he didn't believe he had at least four more votes. And none of them have given us any reason to believe otherwise.
Have you been paying attention? For the last two and a half years, we've seen the entire court system bend over backwards to carve out special exemptions that only apply to Trump, or make Trump exempt from certain laws because reasons. Trump has received special accomodations for no reason other than the fact that he's Donald Trump. They could very easily declare that the Supreme Court will determine which special counsels are valid and which ones aren't on a case-by-case basis. And in this case, the special counsel is invalid because Trump couldn't have been investigated for official acts in the first place, per their previous ruling. And since this presidential immunity doesn't also cover the president's children, the special counsel in that case is valid and therefore Hunter's conviction stands.
If you objectively follow the logic of their previous rulings, this is pretty much where that road leads to. Special counsels investigating Trump are invalid because Trump is covered by Presidential immunity. Special counsels against Hunter biden are valid because that immunity doesn't cover a president's son (until Eric, Don, Ivanka, or Jared need it to). Special counsels currently investigating Biden are valid because it's not the court's place to interfere in ongoing investigations, and removing the special counsels would be too disruptive. Or something. It makes sense as long as you don't think about it too hard. Or at all. Or if you're a brazenly corrupt Supreme Court judge.
Precedent doesn't matter any more. The rules now apply when the Supreme Court says they do. And if they say that the rule only applies to Trump because fuck you that's why, they're going to say that the rule only applies to Trump because fuck you that's why.