Health –
first of all, don’t say Lashon Hara about millions, besides which how do you know which minhag is correct?
second of all I (loosely) quoted a source from the Gemara, which Rav Ovadia quotes (better than I can)
My point in quoting him was not for telling people halacha leMaase, but to quote a source and a posek to point out that we are talking about minhag hamakom. Different Kehillot developed different minhagim.
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The Tur in Orech Chaim (siman 91) poskens that since it is not customary to stand in front of dignitaries and heads of state while barefoot, one should not daven barefoot.
The Bais Yosef writes that from the language of the Tur we can deduce that in countries where it is customary to be barefoot even before dignitaries and heads of state, such as Arabic countries, it would be permitted to daven barefoot.