You DO have to share data in other ways, usually datawarehouse or services, but that is not the same thing.
I’m not saying literally every source of data has to be shared and centrally managed. I’m also not saying “rdbms accessed via traditional client and queried via sql” when I say database. I’m just saying a shared database of some shape is inevitable.
Also, operationally it’s not “semantics” at all. You don’t get into (many) operational problems with analysts sharing a datawarehouse. You absolutely do with online apps sharing a rdbms, they aren’t the same thing.
A data warehouse is a type of database and is does need to be managed. Your assertion that it is easier to manage is orthogonal to my assertion that there will always be a central database to manage in an organization of decent size.
Decades of experience have shown us the massive costs of doing so - the crippled velocity and soul crushing agony of dba change control teams, the overhead salary of database priests, the arcane performance nightmares, the nuclear blast radius, the fundamental organizational counter-incentives of a shared resource .
Why on earth would we choose to pay those terrible prices in this day and age, when infrastructure is code, managed databases are everywhere and every team can have their own thing. You didn’t have a choice previously, now you do.