How do I know if my child actually wants this, or is doing it for me?
Ask what they would do with a completely free Saturday. A young person doing it for themselves answers immediately and the sport is somewhere in the answer. One who is doing it for you takes a moment, watches your face, and gives you a careful answer.
Why the question matters more at fifteen than at eleven
At eleven, most children do what is in the family calendar and enjoy it. At fifteen the commitment becomes real, the volume goes up, and continuing requires actual wanting.
This is the age at which young people who were carried along by enthusiasm and routine start needing a reason of their own, and it is when a lot of talented ones quietly stop.
The tells
They talk about it in terms of what they have to do rather than what they want to do. Their reasons for continuing are about other people, including you and their coach. They are relieved rather than disappointed when something is cancelled. They cannot picture themselves still doing it in two years.
None of those on its own means much. Three of them together across a season means something.
The parents this catches out
Usually the ones who are not pushing. Plenty of parents drive four hours on a Sunday, pay for coaching, watch every game and never once say a word about performance, and their child still concludes that this matters enormously to Mum or Dad.
Investment reads as expectation whether you intend it or not. That is not an argument for caring less. It is an argument for saying the quiet part out loud occasionally, because they will not assume it.
I would be just as happy watching you do something else.
The sentence worth saying
It sounds small, most parents feel they have already communicated it, and almost no young performer has ever actually heard it said.
If the answer is no
A young person can love a sport and hate the pathway. Those are different things and they get confused constantly. Before anyone stops, work out which one has gone, because dropping down a level or leaving a programme while continuing to play is a real option and it is rarely offered.
If it is genuinely the sport, let it go without making them justify it. The ones who are allowed to leave properly are the ones who sometimes come back.