And you are welcome to view it that way. But once the defender falls, he lost LGP. Why should I penalize the offensive player for his higher level of skill?

Where does it say LGP is required for a 5 second count?

A player is not continusously guarding an offensive player if he doesn't have LGP.

Because by your interpretation then the offensive player beating the defender shouldn't matter at well.

However, As An Official, Na Na Na Na, Na Na Na Na, Hey Hey Eh, Goodbye ...
 

The 28 foot line, inbounds, on the court, is no longer required according to the Court Diagram at the beginning of the NFHS Rulebook. Coaching box lines should be out of bounds.

When I was coaching middle school, I used those 28 foot lines to teach my players how to properly fill lanes on the fast break. Players filling the left, and right, side lanes were supposed to actually touch the 28 foot line, or they got an "earful" from me. As a coach, I was sorry to see them go.

9.10.1 SITUATION C: Team A has the ball in its own frontcourt. B1 stands within
6 feet and facing A1 while A1 is holding the ball near the division line. RULING:
In five seconds this would be a violation. In the situation outlined, as soon as B1
has assumed a guarding position, both feet on the court, facing the opponent, no
other specific requirement is in effect. The amount of movement or the actual
body position of the player is irrelevant.

So INITIAL LGP is required, but I don't know of anything requiring that LGP be maintained. In fact, this very case book play seems to indicate the opposite. Especially important is the part about the actual body position not being relevant. Yet it isn't clear exactly what that means. One could take it that the defender can fall down, sit down, or even lie down and the closely-guarded count should continue or one could read the play to say that there are two and only two requirements which must be met--both feet on the court and facing the opponent. If either of those requirements ceases, then the count ends.

I'm inclined to read it in the first manner as forcing the defender to keep both feet on the court is clearly silly. The defender has to be allowed to move and even jump.