That's like asking why don't we expect burglars to not burgle, they won't, but that doesn't mean walling off a whole neighborhood is the solution either.
it's effectively the same, small banks just shove you out of the building and refuse to open a bank account for you if FATCA applies to you, their compliance is through just not accepting US tax payers.
This is a real issue that leaves US citizens only able to open accounts at bigger banks (with shittier services but enough budget to hire a FATCA compliance department)
I imagine legally would need a lawsuit to set a precedence, and if a license owner sets an over-reaching precedence of what a wrapper is, they risk losing customer trust and companies avoiding them like the plague.
e.g. timescaledb going after a tsdb as a service company offering tsdb behind a graphql wrapper vs timescaledb going after a financial company offering timeseries data collection and viewing.
I think a good border test would be, would timescaledb allow you to offer a metrics and logging service? technically you're offering timeseries database functionality, but it's in a constrained domain, and very clearly a different product, but still effectively CRUDing timeseries data.