I'm all for doing what your heart desires w/o consideration for the resulting $ stream. Yet, virtually all of us went to college for better opportunities. Then, we ventured further to dental school for even greater opportunities and increased security. To travel further into areas of specialization provides (for some) increased opportunity and security. It can be debated whether any additional security is needed, given how well GPs do.
I find it a little hypocritical when guys doing general dentistry suggest I'm doing ortho for the $. This isn't a daily occurrence, and is often done in a fun-loving way, but the scenario comes up. I have lots of reason to specialize, one of which is the ortho business model. I routinely gently ask these individuals why they did dentistry. Of course, if they're honest their answer rightfully includes lifestyle ($, family life...). This isn't bad. This is reality.
I just went to google and entered "dental specialists income." The second item to surface was an ADA report. Knowing the facts about the average incomes is good information to have. Naturally, the $ ain't the only factor to consider. To ignore the numbers, however, is fairly ridiculous.
http://www.ada.org/prof/resources/pubs/dbguide/newdent/income.asp
Before looking at dental school, most of us considered income levels, hours worked, etc. and compared them to numbers associated with lawyers, physicians, and many others.
I guess, ptrianon, these folks wished you had searched for answers in previous threads. Maybe you could have, but here's a link for you to include w/ your other searches. Good luck!