All you need to do is ask Riddick Bowe why, Wilder`s all about the money, you heard his shambles of an interview after he destroyed the hapless Breazale.
Your calculations are completely wrong BM. AJ in other 3 years will be 32, and Wilder will be 36, a 4 year difference, not a 6/7 year difference. Now AJ is 29 and Wilder is 33, both of their birthdays are in October. AJ will be 30 this year and Wilder 34.
The fight will happen when one of them loses. This fight will marinate until both guys are in the Paralympics, and wheel chair boxing has become a new sport.
Ortiz will be 67 and probably still in WBC rankings for a 4th shot at Wilder, whilst Whyte has to fight Breazeale, Fury and Triple HHH in a 3 v 1 handicap match for the WBC super diamond mega ultra interim belt which will put him in line for a crack at Wilder in 2065.
Power is the last thing to go. Wilder will have it still, even in his late 30s. It's not like stamina or reflexes, which start to go early to mid 30s.