“all referred to pagan deities”
==
That’s the point right there, it assumed a multiplicity of deities - a pantheon, not One True God, especially not the Judeo-Christian one.
Practically all non-Jewish ancient religions assumed a multiplicity of deities. Nevertheless, words from their religious cultures were appropriated for Christian use.
Interestingly, Muslim political forces in Malaysia are trying to make it illegal for Malaysian Christians to use the word “Allah” in their Bibles. The Muslims are apparently too ignorant to realize the Christians had the word before they did —— by half a millennium.
In any case, I can’t explain it further. I can only tell you that historically, culturally, that’s the way it is. You’ll have to ask the Christians why.