I can see why this is frustrating for the collector, and I personally avoid hype knives for that reason. But from a production standpoint there are a lot of benefits to this model, and I don't think people realize the difficulties makers contend with on that front.
It's time consuming and expensive to schedule production runs, and all the more complicated when you need to coordinate processes that a smaller shop is unlikely to have in-house (e.g. Blanchard grinding raw stock, waterjet cutting blanks, double disc grinding, Swiss lathe hardware, heat treat, coatings). Outside processes have additional lead times that need to be coordinated, and they don't always hold to the schedule. You can't produce scale on demand, so you have to allocate runs and see how they do. Keeping inventory is also expensive for a small brand, so you don't want to make more than the market can support. If you see something sell out fast, you can slot in more runs of that model in the future.
The kind of collector-friendly model people are asking for would massively increase the cost of the product, or necessitate massive quantities to offset the inefficiencies. The brands that do this tend to be smaller. So if you want your niche high end knife that not everyone else has, drops are kind of a necessary evil.