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.