https://www.espn.com/golf/stats/hole/_/tournament/401056507
Yes the scoring separation would stay the same. However, then these holes would play as some of the hardest holes on tour, which clearly isn't the desired experience as this tourney serves as a reward for players on tour who won an event. It is much more fun for fans/players to have them as par 5's, fans like to see eagle attempts, if even most are not holed. For the guys that used to walk to school four miles in blowing snow and below zero temps it would probably be par 4's. Much of this whole par talk is simply about personal set-up preferences vs. what the players/tourists/ spectators enjoy the most. Myself I like playing courses where if I perform decently, I have at least some good opportunities for birdies. If the baskets were tougher it would be even better. These golf holes have difficult greens as well. They are easy to play, but tough to conquer, as is evidence by the few eagles on holes that "should' play as "Par 4's".
We changed the par desgination on a few holes on our course.
They play exactly the same, regardless.
I guess it's fun for some to pretend that an average (expected) result is really a good (better-than-expected) result, but that doesn't make the holes any easier or more fun to me.
Par isn't important, of course; we determine winners by total strokes. But it's most useful if it consistently means the same thing -- the expected score.