Do you know why they couldn't switch back to glass syringes?
If you forget to autoclave them or not done properly you end up with infected patients, risk is just too much
If you can't trust them to follow the very easy directions of "throw away the single use syringe", how likely is it that they are going to follow the much more complicated process of properly sanitizing the glass syringe?
Equipment that can be sterilized has been forced out of the market by these disposable things. It is far easier to push disposable product on medical providers and encourage rent-seeking and subscriptions to such things.
It’s exactly the same way with contact lenses. When I was in college in the ’90s, I could get a pair of permanent contact lenses. They would cost a few hundred bucks, but they would last me several years if the prescription didn’t change. They were the same as glasses. You would clean them everyday and disinfect them, and they would serve quite well permanently.
But the contact lens industry decided that wasn’t good enough, and decided that they could sell subscription services for contact lenses that you would need to discard every night.
And those daily wear contact lenses, the disposable kind, basically forced out of the market the permanent ones and now the optometrist regards me as a Martian when I request permanent lenses instead.