What's up with the OT and PT schools requiring a doctorate?

I have a D who is a HS junior and would like to be a PT. She created a list of colleges she’d like to explore and possibly apply to next year. At least half are LACs. All have pre-professional health support and are supposedly strong in biology/genetics/athletic training, which are areas of interest to D. Her plan is to major in one of those while completing pre-PT requirements, then go to grad school. How many years would the doctorate requirement add on if she went this route?

With this new requirement, are people interested in PT better off trying to gain admission to a direct entry PT program? How many years do these typically take to complete?