John - Here's another personal opinion that might address your query. Incidentally, I also agree with what my friends have said before (Dave is dead right in his philosophy - you can't play at all if you don't have some kinda guitar that works! Bob is a mechanical genius and can fix up anything!) They all put valid points (that Donny is always contentious

).
I think you got the answer to your basic question; student models are built to a budget and therefore have mechanical limitations - adjustability being an important one (as CB said). So, the company puts on the most "standard" changes and often has to compromise the KLs positions. Usually you get the Jeff Newman 3+3 (or 4) to fit in with available tutor books.
There's a lot in that copedent anyway - I don't have the "double" raise on the first string (just have F# to G) and never felt the loss. I don't lower the second to two notes either (just D# to D). Often these things become popular because some "name" does it and the consequent lick gets popular. Sometimes we get hung up on some change that's popular and forget to learn how to play the guitar. If I don't have a pedal/KL that does some particular thing, I try searching for it elsewhere on the guitar. Surprising how many times it's there.
So get the "best" guitar you can afford to learn on - after all, a 2nd hand pro model will usually sell again for at least what you paid, so you can recoup the dosh if it's not for you? Which is cousin John's point, I think.
Best of luck, Tone.