Not exactly.
There are two different classes of edge drivers.
Everything you said is true for the class of “stock drivers“ which are the ones that smartthings has blessed and which are distributed to all customers in eligible regions as part of a hub firmware update.
In order to get an edge driver “blessed“, manufacturers can submit their device through the official “works with smartthings“ certification process, and an edge driver along with it. Then it becomes part of the stock drivers and gets distributed for everyone to use.
But there is a second class of edge Drivers, “custom edge Drivers,” which can be written by anyone. You can write it for yourself. You can take one of the stock edge Drivers which has been made available on the smartthings github and modify it somewhat and publish it for yourself. You can write one and share it with other people in the community, as many community developers have done.
If you are using a custom edge Driver, you subscribe to the author’s “channel,” select the custom edge driver you want, and then it gets automatically downloaded to your hub shortly afterwards.
And you can ask community developers to add a new fingerprint to their custom edge driver. Many people do that.
So…true as far as you went, which was stock edge drivers. But completely different for custom edge drivers. 
Please see the community FAQ for more details: it should clear up a lot of the confusion.
FAQ: I have no idea what Edge is. Is that a new developer tool? (2022)
by the way, the original question that you are responding to was written 18 months ago. The smartthings architecture changes very quickly, and our knowledge about it changes pretty quickly as well. So any question of that type that old is likely to be fairly out of date by now. As a community, we do try to keep the FAQs up-to-date, so those usually continue to be helpful, but just random questions like the one I started in this topic gets stale pretty fast.