It isn't pronounceable as a word, it is an initialism because the letters that compromise it do not allow it to be pronounced as a word. Unlike something like NASA which is a full blown acronym because it can be pronounced
Do you say hetips for HTTPS?
The sequel thing didn't even start naturally, it picked up this sequel moniker because of some ancient trademark beef in the 70s between the original devs when it was named "Sequel" and some company (That isn't even in business anymore)
They renamed it SQL and out of protest against the company people continued to call it sequel even though it makes no sense and 50 damn years later here we are. Everybody involved with direct involvement is probably dead or longggg since retired. It wasn't termed because it was easier to say and it sure as hell wasn't termed because its proper.
If it was originally called SQL and the above never happened, I guarantee it would just be another DNS or HTTP and many many pointless debates about it would have never happened
Disclaimer, this doesn't apply to the MS product that is called sequel