Does it matter to us whether Lee Kang-in plays well or not?

Hasn't the era of projecting our own identities onto someone just because they are also Korean passed?
I want our country to prosper, but
Lee Kang-in's football performance has little to do with our national success,
and I think seeking vicarious satisfaction through sports is quite outdated.
It's not like he has a great personality; he's a kid with a bad attitude...