Mush...interesting and it appears that you may be correct.
But the Beeb will still be able to cover the Olympics in some form or other, according my this link, right up until 2024 ::::
https://en.wikipedia.org/wiki/2020_Summer_Olympics#Broadcasting
By the way, it looks as if the Beeb were instrumental in starting Children in Need, Comic Relief, and Sport Relief, and I can see no reason why they shouldn't continue to provide the highly popular Telethons that raise such huge sums of money.