So, what's to prevent a developer from also skipping over proper application of this hypothetical URI scheme if they are in a such rush? It seems like this is a similar level of pedantry that would be disregarded if one were in a hurry.
This would then allow other tools (e.g. git, GitHub, pre commit linters, frameworks) to flag this as a problem, either with a warning or an error, depending on the tool.
The idea is that then the novice/rushing expert is prevented from this easy to make mistake.
It will be easiest for developers in a hurry or without knowledge to simply copy and paste these third party strings.
(Pedantry is only required when writing their own software to generate bearer tokens, not even using a library or framework, and developers rarely do that, especially the kinds of things written in a rush.)