Recursive mutexes are a hack
Recursive mutexes are a hack. There's nothing wrong with using them, but they're a crutch. Got a broken leg or library? Fine, use the crutch. But at least be aware that you're using a crutch, and why; and once in a while check out the leg (or library) to be sure you still need the crutch. And if it's not healing up, go see a doctor, because that's just not OK. When you have no choice, there's no shame in using a crutch... but you can't run very well on a crutch, and you'll also be slowing down anyone who depends on you.