I'm not saying every musical theater actor can do film or television, but a lot of them can. A lot of them are brilliant actors who absolutely don't need to sing to prove their ability and don't get the opportunity.
I felt alive when I read a script and acted out a scene, or sang a song. It was my dream. I'm just very lucky that I'm still doing it and able to earn a living from it.
For your own self-respect and sanity, your creative freedom, you have to be careful that you don't rely too much on other people's opinions of what you do because it can stunt and inhibit you.
Each form of the acting is different. I think it keeps your mind active. TV, film and theater are different disciplines, as are independent films, opposed to studio films. There are differences in the size and the genre, or a period drama as opposed to a contemporary drama, or the types of characters.