You mention QOL is better in aviation? I'm curious why you think that? You will not be home every night, off holidays and likely weekends, and won't know your schedule for the next month until 2 weeks out (typically).
I do not know much about the required schooling, training and debt to become a dentist, and $100k of debt for flight training might seem like a better deal to one in your position. But try sitting down and mapping out a path to profitability as a dentist versus a pilot. It can take a decade to finally be at a major airline long enough to start making a hefty income. Meanwhile, every two steps up that QOL ladder will usually require a step back. Example of a typical path could be, CFI, regional FO, regional CA, legacy nb FO, legacy wb FO, legacy nb CA, legacy wb CA. Each advancement brings higher pay but can also start you back at the bottom of a particular seniority list.