While I agree in the primacy of neutral buoyancy I'm not certain that students need to be "forced" to dive neutral and in proper trim. At least not in the typical meaning of the word "forced."
One of the most formative experiences in my diving "career" was my own Open Water class, wherein I was simply never shown anything OTHER than neutral buoyancy and horizontal trim when we were in water too deep to stand. I was never told it was "hard" or "uncommon" or "difficult" much less that I was being "forced" to dive that way.
When we did our very first descent in the pool I was told "We're going to swim out to the deep end, let the air out of our BCD and descend half way to the bottom..." and that's where we did skills.
But since I had no idea that was impossible... I just went ahead and did it.
I think you'll find that most students will do the same. Assuming anything else sells their ability - or yours - short.
I like Harry Averill's take on it: "Bouyancy control is not a skill... it's a habit."