It wasn't a hesitation of learning FMA, but when I was a kid, it was more that the other arts were introduced as martial arts with some form of restraint. What I was taught was more of survival/killing techniques which, nowadays, would classify as manslaughter. But with regards to influences, I practiced several arts and I can see techniques overlapping in so many ways that it's hard to say who influenced who. A grandmaster used to tell, years ago, "martial arts is like a wagon wheel, each spoke of the wheel, contributes to the center, and in return, the center spreads out its strength to all the spokes to balance the cargo". Each art complements/supplements each other.