We come from a different place than most people here, both because my DDs started so old and because we homeschool. My ODD had plenty of time to try other things (soccer, swimming, track) and fall in love with other things (ballet, circus arts) before she threw herself into gym. When she had to quit gym (it ended up being temporary but we didn’t know that at the time), she found new things to love quite easily, and still had the things she’d loved all along. My younger DD had to quit T&T and if she didn’t have dance to fall back on it would have been pretty devastating for her. Because we homeschool, our girls have the time to do other things regardless (money is another issue- seems something has to be in short supply), so they try things as they want to. My ODD now does swing dancing and my YDD gave swim team a go. They’re both fiddling around with pole fitness at the moment as well.
I do think that it’s important that they know they are more than gymnastics.. but time and money being finite, it’s ok if they only do gymnastics. A free hobby at home (dancing, drawing, writing), a few good non-gym friends, even a love of school can all be the back burner of their time in gym.