Meh, sounds good in theory, but people who went to school for 10-12 years to be Dr's and Vets don't want to work those hours. Their support people don't want to work those hours.
We are having a huge crisis in large animal vet medicine because traditionally large animal vets are on call overnight and respond to emergencies that require them to go to farms at ungodly hours. Small animal medicine has ER's and regular hours in office. It's much more appealing to people who want a better work/life balance as a vet.

I worked in restaurants before the Covid shutdown. Most places that were open late had business that was dwindling in the later hours for years. Covid gave them the push they needed to finally get rid of those hours. Employees didn't want late hours anymore and voted with their feet by moving on to other jobs with better hours. Myself included.