There's a big issue that is missed here...
The shorter par 3, par 4 and par 5's are part of a course...
As much as the players say they are playing "shot by shot", the presence of a shorter hole among longer holes affects their mindset and strategy.
when you have a sequence of holes like : 450y par 4, 385y par 4, 495y par 4, 220 par 3... the shorter hole sticks out which:
- put pressure on the player, feeling he has to make birdie on the short hole.
- the player might play the short hole more agressively, trying to hit a 290y driver to have a 95y approach... when a 255 3-wood with a 130y approach would be much easier
- the player might try too hard on their 10 footer for birdie...
If you line up 3 or 4 holes in a row between 340y and 400y, the "pressure" effect of making birdie is lost... players will adapt, play a bit safer of the tee and bet on the quantity... knowing hybrid - wedge will give them 4 legitimate birdie chances.
They will only be aggressive on the "no risk" tee shots..
If they miss the birdie on the first short hole, they'll say: naaa I can birdie the next...
So that "short course" of 6400y will resist a bit, you'll scores around par and over par, but you'll see a lot of low scores in easy conditions
It's that exact reason why Augusta National is so great for tournaments, if the tee shot at 12 lands on the green, players are going... OK, 13, 14, 15, 16 are "relatively" birdie holes... they can "breathe" a bit (a little) even if they don't birdie 13...
a golf course is more than 18 separate holes