Hello Aspirant!

Every profession has an importance of its own. No profession is absolutely supreme over others, even a nobel profession like medicine. Because doctors can't survive without equipments and infrastructure developed by engineers. Also, you require staff for managing finances in a hospital. 

Similarly, neither dentistry is better than agriculture nor agriculture is better than dentistry. But what actuallh is better for you as a profession, solely depends on your interest. Think about your interests properly. If required, sit fown and discuss with your parents, teachers and seniors. Weigh the prospects of each of the profession. Then see which excites you the most.