Pretty much every other possible mitigation effort requires people to abstain from activities that would otherwise bring positive value to their lives, and for what? So that if people happen to be infected without knowing it they'll have less opportunity to pass it along to someone else who—if they do get infected—will probably turn out fine unless they didn't get their vaccine? That's where I start to say I'm not interested in playing along anymore.
...or have a weakened immune system. People receiving an organ transplant, cancer survivors, autoimmune disorders - these things are not rare by any stretch, and these people had enough trouble staying alive even before Covid. Do you want to re-think you answer with this in mind?
Not really. It sucks to have a weakened immune system, no argument there. If you're in that category you definitely need to take precautions regardless of what mitigation strategies I may or may not employ, and I don't envy you for that. If you plan to visit people in that category, additional caution also seems warranted; maybe take a COVID test beforehand or something? As someone with a fine immune system who never (to my knowledge) directly socializes with transplant patients etc., I consider my responsibility to be a bit less than that. I got my vaccine (boosted!). I wear a mask when requested. I consider myself to have done my part there. Again, if everyone did that much and nothing else the situation would be much better.
It's like if you have a food allergy: the onus falls disproportionately on you to avoid exposure. You can't expect to show up to a party and assume that all of the food is free of gluten, nuts, bananas, shellfish, dairy, and everything else that people tend to be allergic to. No, you need to ask about ingredients if you're not sure, maybe bring your own snacks, or if the allergy is that severe maybe you need to avoid parties entirely unless you know all the attendees are committed to doing what's necessary to accommodate you. It's not really fair that you have to do extra work to keep yourself safe from foods you can't eat, but it's also not fair to expect everyone else to abstain from bringing foods that they enjoy to a party just because a small minority might not be able to stomach them.
So, let me throw it back to you. If COVID will be around forever, what things should we not have anymore because they're just too risky? Should nobody ever eat at a restaurant again? Sing in a choir? Play in an orchestra? Go to a basketball game? Where's your line between acceptable and unacceptable risks given the ever-present virus?
I'm also operating on the assumption that COVID will be around forever. However, I do not accept that the only reaction to a permanent change is to accept all negative consequences.
There are mitigation measures that can (and should) be taken. Improved ventilation is the most obvious one. Others can require vaccination and/or frequent testing, which orchestras are doing already. Mask mandates should stay, for all - it's too unreliable to trust the goodwill, and people respond better to simple rules that don't change. WFH rules may need to be strengthened, possibly through legislation. Paid sick live is a must - it's a travesty that we didn't have it before, it's 10x worse that we don't have it now. Internet must reach 100% of households.
This is not a very concrete answer to my question. Do you or do you not believe that there are activities that we inherently should not do ever again while COVID exists? Or are even the most risky things (like singing in a choir) okay to return to once they upgrade the HVAC system and everyone is vaccinated?
In general, I don't have all the answers (and that's an understatement), but I invite you to approach it from the angle of "if there's the will, there's the way". What this topic tells me is that we lost the will, not that there's no way (again, look North).
At the beginning of the pandemic, I was hopeful that we could come together to defeat this thing. We did not. It's not just that we lost the will, it's that we never had it, at least not in sufficient numbers to move the needle. Given that reality, it seems Sisyphean to continue to make sacrifices for the sake of controlling this disease.