Why? Because when we ask other schools to make changes to accommodate BYU's beliefs, it is they not us who pay the price.
So, for example, a tournament switches to a Thursday to Saturday schedule from a Friday to Sunday one then it forces students from all other participating schools to miss a day of class. If 11 other teams are at the tournament then 11 students pay a price for one BYU student to avoid Sunday play. This is no small sacrifice for the students involved.
Is it really living a Gospel principle when others pay the price? A true sacrifice by BYU sports would be giving up playing entirely and bear the entire cost themselves.
Let's make a Christlike gesture to these other schools and show them we are willing to help them. That way BYU keeps sports as a valuable missionary tool and, I believe, creates goodwill that will not go unrecognized. Isn't that how you touch the hearts of others?