Many business people I've worked with are handy with SQL, but couldn't write e.g. go or python, which always surprised me. IMO SQL is way more inconsistent and has a mental model far more distant from real life than common imperative programming (which simply parallels e.g. a cookbook recipe).
I find SQL becomes a "stepping stone" to level up for people who live and breathe Excel (for obvious reasons).
Now was SQL considered some sort of tool to help business people do more of what coders could do? Not too sure about that. Maybe Access was that tool and it just didn't stick for various reasons.