Well, it is you that mentioned “evil machinations”! I prefer to apply Hanlon’s Razor - “Never attribute to malice that which is adequately explained by stupidity”!
As for the “why all the fuss” question, as I pointed out, reversing a long held convention for trivial reasons opens the door to transposition errors. Look at it this way, say a new Association has several thousand summits identified as probably valid from satellite data. Each one of those summits then has to be individually identified from maps, giving them a name, height, and location of both the summit and the key col. This data has then to be entered into a spreadsheet. Most of us would regard this as a mind-bendingly boring routine task which will continue for months, and since part of this routine includes determining latitude and longitude which then has to be transposed to longitude and latitude before entry onto the spreadsheet, the potential for error becomes clear. From time to time these transposition errors show up in the SOTA summit lists and have to be corrected, and its all because some genius decided that he was too good to follow a long standing convention and reversed a co-ordinate system because " it’s now 2017 and things have moved on from those days."
Oh, and any point on the geoid can be related to a sphere by a signed difference, so your point is irrelevant to the discussion!