You should be isolating either way. Just because you can go everywhere doesn't mean you should. People going out and about while unknowingly positive is why this thing won't end. Testing positive and deliberately not isolating is even worse.
You're right though: If you look at it only through the lens of individual incentives, the official test has no upside. One of the huge problems with governments' responses to this pandemic is they are not closing these loopholes. People will take the most convenient option, not necessarily the one benefiting public health. To align individual and societal incentives, governments need to make not-isolating when infectious more inconvenient/costly than isolating.
but did you read what I wrote? I will stay at home isolated until I'm negative. So for sure I will stay home. What I question is how good is the idea of "vaccination + booster" vs "lets test everyone, everywhere" specially now that is more or less clear that Omicron can go through the vaccines.
You're right though: If you look at it only through the lens of individual incentives, the official test has no upside. One of the huge problems with governments' responses to this pandemic is they are not closing these loopholes. People will take the most convenient option, not necessarily the one benefiting public health. To align individual and societal incentives, governments need to make not-isolating when infectious more inconvenient/costly than isolating.