This seems just completely wrong. The trend for drones is that features and capabilities are increasing and costs are decreasing because they're based on cheap software and cheap consumer hardware. The trend for unguided mortar rounds or artillery shells is that they're as cheap as they're ever likely to be at thousands of dollars a round, plus the cost of the gun and its replacement barrels and crew. (guided artillery shells or missiles are so expensive they're a separate conversation)
If these small drones provide capabilities that are, as your comment implies, not new but they do it with a cost effectiveness that blows away anything that came before, that's a pretty big deal.
Capabilities are not the same thing as effects. A drone represents different capabilities at different price points, but the net result observed on the battlefield are not all that different that past infantry engagements. If enemy infantry knows your position, they can today reach out and kill you at similar ranges as they did in wars past. The how has changed, not the what.
There are also modified commercial drones that just drop explosives, and that is what is mentioned here. Those drones drop their payload and may return to reload if not shutdown. Those drones aren't "hundreds of thousands each", but around $500 each.
As for the drone you linked - we don't know how much it cost Russian to produce Geran-2, but definitely less than you imagine.
Even this is almost certainly an underestimate. Open source intelligence that just the bill of materials for a Shahed is more than the tens of thousands previously estimated. These are probably more on the order of ~$400k [0]
This comment thread is about cheap drones hunting down individuals. They are not using Shahed for that. You can easily build a small drone capable of carrying a grenade for under $300.
If these small drones provide capabilities that are, as your comment implies, not new but they do it with a cost effectiveness that blows away anything that came before, that's a pretty big deal.