To be fair, I've had 'scratch proof' lenses from an optician that I have ruined in 2 months doing exactly that. And the addon coatings upsell is something many retail opticians do as well, unfortunately.
Although that doesn't excuse the practice, it still feels shady to me.
If you have 'scratch proof' lenses there should be a warranty on lenses regardless of manufacturer. Industry standard is either 6 months, 1 year, or two years, and that is probably the greatest value in comparison rather than the nominal difference between hardness. Also any good optician will only say 'scratch-resistant'.
20+ years of wiping several coated plastic glasses on tshirts several times every day and it takes 5+ years to put enough scratches in them to even be noticable (and most of those are probably sports artifacts and from the few times the glasses were put down glass-first).
Although that doesn't excuse the practice, it still feels shady to me.