Because those three are the real reasons companies put radios in consumer widgets. Getting a data stream that can be resold to marketers, getting people to buy more garbage more often, and getting people to pay a regular subscription fee to avoid having to care about buying and disposing of garbage products.
There is no way to escape this. By advancing IoT we also advance IoS, it is as simple as that.
The way to fight IoS is not by restricting advancement of technology. Even if we wanted, it is already way past it. We can assume governments are years if not decades ahead.
Would separate (v)LANs and super strict firewall rules not help somewhat?
With the addition of things like DoH it's going to be trickier to "secure", or rather, isolate IoT devices for sure, but _impossible_?
As for surveillance. Well, it is a transceiver, hence it can be localized and tracked.