I do, however, assume they are people! Riddled by impatience, wishful thinking, confirmation bias, etc. I know I am, and I hardly consider myself stupid
Most people watch good players and, like you say, see something that looks easy - and they want the results fast, with minimal practice. They look for shortcuts, like most of us. Weren't you the one advocating unrealistic expectations? Well, the problem with having unrealistic expectations in this case (not unrealistic goals and dreams, mind you) is you will get frustrated and unrealistic expectations can increase the frustrration.
Since new players commonly over-emphasize driving length, they search for the quickest route to improvement in this aspect of the game. They get the discs that says Maximum distance, they unsurprisingly expect these drivers to go further than their other discs, and when they fail to consistently do so they assume, correctly, that there's something wrong with their technique.
But then (here comes the point at last) they don't try to throw flat and with control, they try to throw harder - and once in a while this actually works! Being human, we remember these throws the best, so we think we're on to something, and... fast forward some months, they're still throwing 250/300, with no more control than before and they've developed a set of nasty habits - OAT/wobbles, more speed than spin, always throwing flex shots because their only other option is having the disc hyzer out, etc etc.
Disclaimer: this is, obviously, less likely to happen if you have good players with the ability to give good advice around you or if you come from a technical sports background (so you have a better understanding of how acquiring skill takes time).
The theory of discing down (from "Clubbing down" in that most traditional sport of ball golf, btw), is the best way I've seen to realistically enable people to be able to execute those controlled shots, at a distance they quite rapidly can be proud of, and get constant improvement that keeps the fun level up!
It's not training wheels, it's realizing that you don't put a toddler on Lance Armstrong's bike. Or, to quote a wise man I once argued with; "How many Little Leaguers would do well using Babe Ruth's bat?"


