The good business reason is that Bluetooth etc cost essentially nothing compared to the $$$ they make selling your privacy.
e.g. $150 TV + $75 chips - $100 rebates = $125 -> negative cost and +10% margin to add chips!
And the problem is that we as customers are still charged the full $225, not the essentially nothing.
I operate on the scale of hundreds to thousands of units, and Bluetooth adds less than $5 to each unit. At millions, I assume it's more or less free.