Use wood planks as a temporary crossing, don't ferry cars over them. Run your bake sale with spreadsheets, don't run a multimillion business with them.
I don't need to link you to the resources on the astronomical number of problems that are caused by spreadsheet-oriented business processes and shadow IT. Using spreadsheets instead of proper systems shifts the operational burden onto humans, who certainly do not have perfect availability and durability.
I wonder if this migration from spreadsheets to databases is what helps ossify business culture in older companies. With spreadsheets, change and iteration are easy with fast cycles. With a database, change is a pain and iteration cycles are very long since everything has to though multiple stages of review, approval, and implementation.
I don't know how much time you've spent supporting spreadsheet users, but I work with them daily and I see first-hand the amount of energy being wasted. Stuff that takes them all day, they could do in a single SQL query. Probably wouldn't take them more than a day to learn how.
It's not about democracy, it's about doing things in a sensible way. I'd be happy if they used another "democratic" tool like Microsoft PowerBI and a fully-managed database.
Side note, I'm quite surprised that somebody in this form is so staunchly in favor of spreadsheets.
While long review cycles for schema changes are annoying, I find it more worrying that most businesses have zero review process at all for spreadsheets.
I lasted 3 months only, got tired of the sudden meetings discussing why can't we give fast and accurate results.
Also, the fact that you offered to do it for free makes me question your motivation. I think you were trying to make your own job easier at the cost of the users no longer having the thing that worked for them.
It can be very difficult to replace spreadsheets because the UI has had 30+ years of iteration.
The "we will destroy all your accounts across our entire service catalog including any potential of future earnings if you cross our AI abuse detection thresholds" sword of Damocles is obviously unavailable and thus out of scope.
Great use case