what do you mean refuse by principle to fix it? the solution that comes to mind is for a whitelist that is implemented either in federation broadly or lemmy specifically for certain categories (think TLDs) which are agreed to have a certain focus, like on literature or video games or music, where the instances themselves can join or link to.
kinda bypass a community being held hostage (or kept isolated) by an instance, the whitelists can be determined through a simple majority (first past the post) or any other method by members of communities rather than instance moderators/admins.
i get that many folks don’t like hexbear and i have nothing against them, i certainly don’t want to force them to see content they don’t want; giving granular control over specific content (not just a blacklist like per-user instance blocking) seems ideal.