I mean you're joking but there are maybe ~20 brands who produce and sell inhalers. Maybe I need the inhaler but I also have a certain amount of choice, and presumably some are more expensive than others. Insulin is a famous example, because you can buy a vial for ~$30 or a nicer one for $300. They all effectively do the same thing but there is a quality difference between them, usually in regards to release time and how often you'd have to take it.

There are some market pressures in healthcare when multiple companies can compete, although it's so heavily regulated it can be hard to see the market pressures in practice. Consumers often do have some amount of choice though