I don't think that's a controversial question at all!
Anything you do in life you want to be sure of it, but you can always change!
I wanted to be a musician, and majored in it in college, but after 3 years of not "making it", I decided I wanted to pursue my flying dreams. Now, I'm out of money, so I have to wait to get my CFI rating to likely find a flying job, the Air Force won't return my calls, the Navy says I'm too old to fly, and it's going to be a long road ahead of me.
So I'm not 100% certain I want to put myself through a lot financially and emotionally only to never make it, but I still keep plugging along - because nothing compares to that magical moment when you're going down the runway, and rotate, and just magically lift off into the air; and nothing's as satisfying as making a beautiful landing (especially with a pretty girl on board that's impressed by it!!!!!!!!)
How far are you into your training? How old are you?? I'm 28, and have my commercial w/multi and IFR, and if I never make it professionally, I'll still have the skills I've learned to be able to do something I love to relax and stress-reduce from whatever job I might be doing to pay the bills.
John