So, long story short, you don’t you don't know either.
I may not "know", but I think I have a reasonably good idea. A Kickoff seems
DESIGNED & INTENDED to give the ball to "R" so as to start, or continue Play after a score. Over time, Rule makers have developed a
limited number of "exceptions" that would allow "K" to be awarded possession.
As I understand the meaning of "pooch kick", it's a lofted kick over "Rs" restraining line, designed to land behind that line, but before any of the deeper receivers, but close enough that "K" could reach the landing area before any "R" players. One problem is it only satisfies half of the restrictions for K recovering and keeping possession (it goes 10 yds, but doesn't touch the ground).
The recent "Pop-Up" kick eliminated that deficiency, but after extensive discussion and review, was declared illegal.
A really basic principal of (a) how to start a game, or (b) restart it after someone scores is choosing which team starts with possession for (a) by a coin flip, or (b) by a "free-kick",
BY the scoring team,
TO the scored upon team, with
LIMITED exception opportunity for "K" to capture possession.
It's really nice, and helpful, that we, as field officials, understand the logic behind our rules, but
NOT REQUIRED that we agree with every decision and detail included by those responsible for designing each rule (including that which might differ from other codes). We are expected to
KNOW, specifically, what each rule
REQUIRES.