Is dentistry still a good profession

I have heard that the income of dentists is decreasing and therefore it is becoming harder for dentists to pay off debt. I would really like to become a dentist but I come from a poor background and don't want to pay a lot of money to selfishly study something that isn't going to benefit me and my family in the long run, financially. I have heard many people just talk down on how dental school and uni doesn't prepare you for real life working as a dentist, etc.
Is being a dentist still a stable, secure and good profession to select? Is it worth it? Because I am working my butt off right now and I would like to hope that it is paying off ..

I apologise if I sound naive, I have little help atm with my career path and most of my knowledge is research from online, which isn't always reliable due to the heavily opinionated tone of what I have so far aquired

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