I suppose some companion questions we should ask ourselves are by what authority do we support any translation being made, by what authority do we support using multiple translations, by what authority do we assert that it is God causing all the new translations being made, etc.?
Well, we know ONE authority for a type of KJVO was the British govt. which outlawed all other English translations in the 1600s. (However, the Geneva & Bishop's versions survived, although in much-lesser numbers.)
But now, the KJVO says the KJV is the ONLY valid English Bible translation. What is his/her authority for that doctrine?