Travel? Going on a cruise, where you’re confined for days, is different than many other forms of travel.
We still take precautions - we’re both vaxxed and boosted once, we still wear masks and avoid confined spaces often, but we’re not living our lives in fear of Covid anymore. If either of us feel sick at all, we’ll do a Covid test, but we don’t arbitrarily test with no symptoms whatsoever - e.g. after travel. The OP mentioned travel, yet other family members were infected at the office? So test after you go to the office and BB tournaments?
Unless you’ve confined yourself ongoing, you can’t know when you’ve been exposed, we all have by now.
Both of us are in good health, our probability of severe Covid is low, and it appears immunity after Covid is better than that from vaccines. I know quite a few people our age in at best average health who’ve had Covid, it was bad for 24 to 96 hours, but none were hospitalized. We’re not planning on another booster, maybe with next years flu shot if that’s an option.
For the most part, predicting who is susceptible to severe Covid is known. The vast majority have been older in poor health or younger with one or more co-morbidities. Yes I know there are exceptions, but that’s not a basis for decisions, you could die from the flu too. [I am not equating Covid and flu]
To what I gather is the central question however, if either of us were infected, we would self quarantine. It’s not OK to knowingly expose others IMO, friends, family or strangers. That said, I’m sure some people knowingly expose others all the time…I can’t control that.