Appreciate your story and condolences for your loss.
That being said I think your story is a cautionary one. I have always thought that a one size fits all approach to a minimum living wage was not workable to to variables in cost of living. But that still doesn't mean a minimum living wage shouldn't exist, just that it has to be more complicated, perhaps tied to a COL index or something the experts can figure out. But that is a technicality - it's just easier for a movement to tie itself to a '$15/hr living wage mantra' vs 'there should be a living wage tied to the cost of living and other economic indicators based upon geography and other factors'. Hopefully when it gets to actual legislation all this is figured out.
The other thing is the perceived value of work you assign to things. We are taught that a lot of work that is mindless and simple is simply not worthy of much compensation. When in reality that is a shit ton of the jobs around us. And they can't just be filled in by the part-time schedules of students going to high-school, college or a trade school. That is just way too idealistic. As you go about your day count the jobs that you feel anyone can do and they will be a lot. A lot will be full-time. And then think if you feel it is honest work. And then do you feel that these people are worthy of earning some sort of basic living that includes some sort of reasonable and clean living space, transportation (whether public or a car), food that is not just the cheapest crap, and then some sort of extra for entertainment. And then ask yourself if they deserve healthcare.
Today going about my day I encountered or passed people doing simple work such as bus drivers, a receptionist, bartender, doorman/security, cashiers, day laborers, cleaning/janitorial staff, retail floor staff, cooks, taxi drivers and more. I couldn't think of one job I didn't feel they deserved a living wage for an honest job PLUS health insurance. Why do hard working people not deserve health insurance? They aren't lazy parasites. A lot of these jobs can be done by many people but they are still work. And can really drain you from the repetitiveness of the labor for sure. If that's all you ever dream of doing, that's ok. There will be plenty of others striving for more because there will be plenty more to get.
If a living wage compresses the pay scale then people won't get the training necessary to do those other jobs, they will be forced to pay more as an incentive. That's an experiment I'd be glad to make instead of looking down upon those who work good honest jobs and have to live sub-standard lives.