National sport organizations may aspire to have
athletes arrive at the elite level after sampling many
sports. At the same time, a family may be given an
ultimatum from a coach who threatens to take away
a spot on the team if the demands of total commitment
aren't met. If it's not a coach, the pressure can come
from a fellow parent who seemingly always has his child
in another camp, skill session or private lesson - all in
the name of getting better at a single sport.

What is the main idea of this paragraph