Uncle Bob would be very upset by this statement. He advocates a maximum of 4-5 lines per function to ensure readable code in his Clean Coders video series. Anything more, and you need to refactor into smaller functions.
Yeah, and you end up with myriad of functions which are used once and only once and it becomes impossible to actually find code which does something useful.
I have a much harder time with "_tcscpy_s" and similar suites of functions where a single-letter typo is likely to be a different function with the same signature.
Domain-specific languages are productive; their parts combine in ways giving novel results. A list of a million verbs you can only ever use for one purpose is not a language in that sense.
You're right that you end up with a myriad of functions, may of which you only use once, but I was surprised how often I actually been finding myself reusing something. I have much more code reuse than I originally figured.
One thing that might be an issue, depending on your temper is that your code almost becomes a DSL. Programs are pretty much stringed together by this "myriad" of custom functions, that might not be useful outside this one program.
Uncle Bob is preaching software engineering as engineering to the heathen masses. The JPL Standards are a sermon for the choir. Uncle Bob doesn't, so far as I know, advocate C for all critical code.
How about we stop blindly accepting whatever UB says, most of what this man says is crap, really