In what universe is "Ten" a more common pronunciation of "X" than "X"? You might have an argument for "II" or "III", but I'll be shocked if any street in USA is named after the tenth generation of really unimaginative namers.
Or do you think they had a team (on a completely different project or perhaps company) write a text to speech function that wasn't well suited for directions.
Streets have lots of numbers after all. People frequently have numbers in their name.
(Leave the software engineering to the software engineers)
I wager that there is more text online about Louis XIV than of Malcom X. Certainly there are many more books on that epic corner of French history than one modern US leader. Then there are all the British kings. Point an AI at the internet and it likely would decide that roman numerals are most often pronounced as number than letters. Malcom X would be rare an exception that might need to be hard coded.