I guess you are so poorly educated that you're unable to read the articles YOU posted and read them for content.
NONE of the articles you posted say "there is nothing wrong with using a 223 on white tail if you can make good shot placement".
ALL of the articles say that the .223 REM is very limited as a whitetail and must be used within it's limitations.
They ALL mention the same limitations: short range, small deer, careful shot selection AND shot placement.
Despite your continual forlorn attempt to make the .223 into something it isn't, the articles YOU post show it for what it is; a very limited whitetail cartridge.
But hey.. you shoot tiny little Texas deer, you shoot them at extreme short range, you don't take moving shots and you can hit your target at 100 yards. So, you're within the limitations.
The funny part is that you think doing so is a "challenge".