Don't bother.Buttle’s senior career was 7 seasons across two Olympic cycles. And as mentioned he only started his first full seniors season when he was 19, and obviously/understandably did not need to continue after winning the World title at 26 (and having Olympic bronze).
The poster's point is: 15<19, therefore if x skater started at 15 (or 14 or 13), they had longevity. Which is true based off math. Entirely and wholly meaningless apart from that.
Buttle, btw, was a very artistic skater, despite not having gone senior at 15. If people like talking about where one may obtain life experience, maturity, ideas - well, look no further than going to college, art school, growing up, so on. Which Buttle did, before getting back to skating.
Everything else is frivolous.

