Non sapphire is lighter and perhaps less prone to breaking from impact (even if not as scratch resistant), that works better for sport use cases.

Many users don’t need sapphire glass for non-sport activities either.

I made a big scratch on my SE by accidentally rubbing it against the corner of a quartz countertop. Of course, this was not covered by AppleCare, because the display still works and is not cracked.

I'd have loved to have this not happen, but the only option (even with the non-SE model) is to pay a premium for steel and cellular, neither of which I care about.

my series 8 has two big scratches. We have the technology to eliminate this but they are gating it behind the less needed features

how much lighter could it possibly be? half a gram? I can’t see that being anything that matters to people and they put it on the titanium case this time which is the light weight version.