The one difference now for kids growing up involved in Sport is this incessant belief that they should play 4-5 different sports to keep them busy or to succeed. Let's knock that on the head for starters. When I hear Children and Parents tell me that Jim does Hockey on a Monday, Rugby on a Tuesday, Football on a Wednesday and Table Tennis on a Thursday I shudder at the thoughts of it. Times have changed and kids are now starting Table Tennis at 6 years in some cases. It is too late starting at 13 now and hoping to become a top player. I totally understand Parents keeping kids busy but I have children exhausted at TT training because their schedule is to harsh.
One reason a young athlete will want to continue playing TT is because they see improvement. If not then they give it up. If they practice at 4 sports they will never be the master of one and only average at all. The lesson here is to focus on the one whether it is Hockey or whatever. I completely realize that my coaching situation growing up was special but I made the best of it. Yes, it's ok to play 4 different sports for fun but to realistically improve in competition you must choose the one that best suits you.
I see some parents encouraging their children to play TT everyday and I can see children improve very quickly. This is great to see but if you play Sport for social reasons then enjoy it, but don't expect a return, and if you want to become champ, then focus entirely on the one.