This is a very good discussion.
There are sound reasons for a very short set of tees, as well as a long one.
Where you lose me is the idea that every hole needs to have a set of tees for every player to "have the same club in"
Players at any club will have a carry distance of somewhere between 60 yards and 180 yards for their 7 iron.
That 180 guy will suck that 7 iron back on many/most greens, and that 60 yard carry person's ball will roll another 10-20 yards.
Factor in scale and consider the shorter player is still only 60 yards away(i.e. they could top it on) and the other is 180 yards-same club, much wider dispersion and variety of shots.
I'm all for that 4500 yard set, and I'm all for that 7000 yard set, and even a 6000 yard set.Within those boundaries I'm confident that there's a ton of great mix and match courses.
Want 6500? alternate between the 6 and 7000 yard tees.
Want 5300? alternate between the 4500 and 6000.
Thoughtful mixing and matching can save a ton of $, a lot of walking and a lot of eyesores-in addition to being far more social.
A 290 yard hole can be both entertaining and fun for the bomber as well as the 150 driver, if designed with both in mind-even playing from the same pad.It can also be far more social.
Then maybe on the next hole they are separated by a 200 yard walk for an ideal landform/forward tee placement-i.e. a 480 par 4 and a 280 yard par 4.
Average out the test rather than trying to replicate it-using the land the best way possible rather than forcing tees proportionately where they don't fit or cost $ to fit.
Then you'd see more tee usage on most holes rather than few ever playing all the way back-or forward
The point is I believe it is a fool's errand to try to design every single hole to have the same challenge for every mythical player.
Not every hole can proportionately fair, just try to balance it out and make the holes fun from every tee.
A 135 yard par 3 that well designed and open in front(seriously, who thinks a front bunker actually intimidates a scratch player-it actually frames the shot and reduces the chance the ball will run away) can easily accommodate every level of player, and I promise you that senior or woman is better with her 7 wood than he/she is with her 6 iron(if she even owns one).
You can quite easily entertain every level of player with 2-3 sets on every hole(and even just 1 with enough room for turf rotation), assuming you have a bit of imagination.
Of course this would be easier if your longest hitting Jr/college player didn't hit it 320, but rather 275...but I digress...
No two people are alike and eventually you would need 30 sets of tees per hole if you really wanted everyone to play holes the same way.
Palmetto did a wonderful job with this for years with a few hidden back tees. Now the tee police have caught up with them and you see a mottled mess of blocks yards apart because like most places, senior men won't play the forward tees.
Having less sets, not more, and not designating gender for tees, would help and get people used to mixing it up.
And here come the handicap, CR,slope police.....you know the same ones who hit mulligans, drop for lost balls, pick up 4 footers,"Put me down for a 5"...
No doubt they're all turf sales people.