This isn't really true on obamacare/ACA plans, even the high-end ones like gold PPOs. The formularies are much worse than employer-based plans. Insurers are required to cover one drug in each therapeutic category, but its usually an older generic. Most brand name drugs like this one have really bad coverage or not at all, which means the insurer won't even negotiate with the pharmacy to lower the drug.
Yes you can use coupons, sometimes, but the pharmacy can't always process them and the manufacture is always change the conditions and expiring them. I got one for my glaucoma drops directly from my eye doctor, and it was expired immediately when I tried to use it. I have paid $650 (for a 3 month supply, the full retail cost) for my drops when the coupon didn't work, and I couldn't get them any other way - I can't interrupt the med or else my eyes get damaged. So that falsifies your "nobody" assertion.