I strongly disagree with this. IMO developers of free-ish as in freedom products OWE it, not only to themselves, but their community to be as profitable as possible within the rules they think that should be followed (and those that are mandatory ofc).
Profit is not only by far the strongest motivating factor for others to adopt your set of rules, but also a guarantee to your community that the product will still be around in a few years and not turn into a rug pull because its developer is burned out after working 80 hour weeks for months or even years for less than minimum wage. It is also something you can trade for your values, e.g. offering great working conditions to your employees or funding projects or lobbying for laws you think will benefit society.