The real question should be, why take the time to write Falcon when you can get the same performance and more code-reuse using hug?
Perhaps they will like your simplifications, and could merge them.
They really aren't compatible concepts. It's sort of like the difference between werkzeug and Flask, those projects wouldn't and shouldn't ever be merged. Falcon is like a much faster werkzeug with a great maintainer, we've discussed the projects together and both agree that they both should remain separate and both are mutually beneficial.
Computers use binary under the hood, but we layer abstractions on top of that to make programming easier and more productive.