How about this? When I travel, I assume responsibility for myself. When I travel, I am among other people who have also taken on that responsibility for their own risk. While we are on vacation - on dive boats, at dinner, maybe at the grocery store or souvenir shopping - we are still among other people who have made the decision to assume the risk associated with their/our activities. Some, understandably, are doing so in order to provide for their families - same as the employees back home (Walmart, Aldis, Walgreens, etc).
When I return home I go from the airport (where I have co-mingled with others who assumed their risk) via shuttle to my car, where I do a contactless payment for parking my car. I drive home, where I remain for at least two weeks (I do my work via zoom), getting my groceries via a contactless program at my local grocery.
I have not, at any time during my travels, introduced myself into a population of high risk people, or people who are unaware they are among those who may have been exposed to covid. I have not unintentionally exposed anyone's friend or relative to covid. I will not do so after returning home.
The way I see it, this is how I can travel responsibly during a pandemic. I'm sure there will be some who disagree, and I am open to hearing a logical, persuasive argument. I also know there is a possibility I could get covid and die - or that my husband might - and I may bitterly regret my decision as I take my last breath. I get it.