Keeping your front hand down is a flaw, prior to popular belief you dont need to protect your hip.

To get back to the crux of the matter; I wasnt baging what you said up there; as we know it would be stupid to go there if you were a standard fighter,
i just pointed out why Roy and others use it and their reasoning behind its avantage for them.

Aside from the stamping of Authority, It can force some opponents to overcommit when comming in, it can distract their vision downwards slightly too which they are not used to when they are comming forwards .It can also create openings that dont usuallly occur.

Roy was not in that position when Tarver caught him.