Kept on, because I was "doing good work for society" and because people depended on my work (though they were unaware of that). Ignored signals of health and sanity and life impact until it was no longer possible to do so. Took about 10 years to go from from "this isn't fun anymore" to "i cannot physically do this anymore"
My advice: don't do that. do something to change the situation. you might make it worse but you won't be gently boiling yourself without noticing.