Who said anything about waiting until the last second? Not everyone has good luck with the RNG. Some people could have been trying for months (not unusual considering cooldowns and relying on the RNG for nest size) to breed a particular dragon and one last nest before their breeding range gets fucked could make a lot of difference for a bunch of people.

45 days isn't particularly excessive considering the wait we've already had, and it's not like it's going to hurt people to wait a little longer.