I don't have to know the will of every DGer everywhere. I have the knowledge of what 11 years experience playing this game has taught me about it, and the demographics of the people who play it.
I know when a group of people tee off together, even on your rudimentary Par 54 layout, their discs don't always land together. On a Par 72ish layout, with longer holes and more evil obstacles, that scatter pattern is going to be amplified considerably.
I know in three years of playing our local leagues, on a couple of those Par 54 layouts, there is plenty of time for socializing, before, during and after the proceedings. The fact that no one goes terribly off course keeps the group together and chatty.
I know in a few trips to Kansas City, big monstrous Blue Valley Park, (at 11,000 ft set long and Par 67) is largely empty every time I've been there. I've seen more illegal ATV riding in that park than I have perfectly legal disc golf. Meanwhile, while the 30 year old "obsolete" top course at Rosedale Park (well under 6,000 feet set short) is crowded every afternoon, and probably all day on weekends.
Honestly, I would like to see disc golf move in the direction of more Par 4 and 5 holes, merely for sake of breaking up the monotony, but we don't have to mimic the ball golf formula of 3-5 Par-3's, 3-5 Par-5's and the rest Par-4's to get a Par 70-74 ball golf like layout. There are other ways to make a disc golf course stand out, and entice people to pay for the experience, besides making it longer.
Bryant Lake Park in the Twin Cities is proof of this.