Not the right major for me? (Dentistry)?

I've been in physical therapy school for 3 semesters but decided to switch major for several reasons. Mainly because I didn't like it at all, and the other reason was because I've a very weak build. I don't have the muscle power needed for physical therapy nor do I have the endurance needed for continuous therapeutic exercises.

I want to switch to dentistry. My dad says it is not the right major for me because it requires great muscle power when it comes to pulling molars out! He says that his friend, who is a dentist, says that.

What do you think? Is it really that hard?

You need to evaluate your reasons for going into dentistry.
It can be very stressful. You are working with highly tense people and that tenseness carries over to you. Also, you are taught to value very high standards of work and people tend to think that dental treatment should last forever. For this reason many dentists tend to strive for perfection, thus increasing their stress level.
As far as physical strength, it is not necessary. I have taught hundreds of girls to be dentists, most of them slight of build. Brains not strength is needed to remove teeth, even the toughest ones. If you need to apply heavy duty force, you have not prepared the bone adequately before removing it.
Look into your motivations before making this serious career choice.

NO WAY !

its not that hard !

Do what you love and you cant go wrong

Schedule a meeting with your dads friend and ask him all these questions.