Career choice - Dentist?

I will be applying to dentistry school soon, but the thing that's bothering me a bit is this: I am actually not pionate about dentistry at all, the reason why I have decided to pursue this is the stability that this profession offers later on in life. I have already obtained an undergraduate degree from university and a post-grad certificate (which is offered as a masters elsewhere) and the career path I am in right now is pretty satisfying financially speaking, but it's a corporate world, which means I would have to work for a company and put up with the whole corporate hierarchy ordeal for a long time .. do the 9-5 plus overtime .. being a family oriented and life-loving person, I know I will be depressed very quickly if I continue in this path .. now my question is: is it right that I am going into dentistry while I am not pionate about it .. who is pionate about fixing teeth?? how many dentists out there are in it for the same reasons, lifestyle flexibility and financial security .. ??