I agree that some parents will pressure kids in an attempt to live vicariously through them. I remember when my boys were younger one went out for football, and because he was a big kid, he did pretty good. He loved defense but they wanted him on the offensive line where he had to be more disciplined. He played until freshman year and had a coach who though he was going to be coaching the Giants within the next 3 years. After freshman year, my son said, "I hated this season, but as long as I don't have that coach anymore next year, I'm good". Well, because the team was undefeated, they moved some of the coaches up with the team when he went to JV. Naturally the first guy there was the Offensive line coach who "claimed" my son for the offensive line. My son came home and told us he was done, didn't want to have to deal with this guys head games for another year. As much as I loved watching him, I always said I wouldn't interfere in this stuff, although if he started something, he had to finish it. He had wanted to quit halfway through the year when the coach was playing mind tricks on him and I insisted he had to stick it out since other team members relied on him.
The other guy decided he wanted to try wrestling, this kid is one of those guys that can pick something up, master it, then be bored with it. He started wrestling and the parents get really competitive in that sport. I saw older parents almost having strokes watching their kids get twisted into positions that would probably kill us at our ages. Because that sport is a one-on-one sport, the parents seem to be more invested since the success falls on the kid alone. Some parents would walk out if the kid was losing or not putting in the "expected" effort. It was heartbreaking to see the kid look up and just see mom there and the father walking out the door.
If the kid has a passion for something, it should come through, the key is to encourage it and see where it leads.