There is a simple, well-established way for society to discourage certain activities without damaging the shared infrastructure for other activities. It’s called a tax. If the externalities you (we) are concerned about were reflected in a carbon tax, it would not be up to individual employees to disproportionately risk their livelihoods and families like this. The project spreadsheet would come out differently for a reason that directly corresponds to the societal problem.
So to me the moral imperative is to make sure that tax comes into existence, rather than making a not-very-impactful personal sacrifice that you may or not be able to afford.