I have had two high deductible plans in the last two year (work changed providers) and here were the things I remember:
Old Insurance:
Deductible: $3,000
Tier: 2
Price: 100%/$60
New Insurance:
Deductible: $3,000
Tier: 3 (maybe 4, I can't remember)
Price: 100%/25%
It was effectively free to me on my old insurance with the copay card (covered $3600) because I would hit my deductible and then have enough to cover the co-pays after. On my new insurance it's not feasible for me to pay ~$400/mo until I hit my OOP ($6000). You might be asking why I didn't look at a PPO plan instead of high deductible, because of the drug tier there was no difference in the price.
HIV tests are still not included in routine bloodwork, even though other diseases like hepatitis are.
The biggest problem is modern medicines aren't available to everyone across the world. So it's still a much more serious problem in developing nations.
So unless "very treatable" is medical jargon with a different meaning from the how the laity use it, calling HIV "very treatable" does seem to be a stretch.
Chlamydia is a curable bacteria infection (antibiotics). There is no known cure for HIV.
Surely it is a bit of a stretch.