The concerns are not only are you paying for it (consumer electronics). You’re “voluntarily” allowing spy devices into your home, which in most cases the exact details of what is being used by whom and when is not fully disclosed/obfuscated.
You are also providing corporations with additional revenue streams (you have paid for the hardware implementation and get no cut), which you have no control over and is for their’s and others benefit not yours.
Many of these devices can and would function without the spying elements but manufactures choose to not offer the option at all, make it very difficult to opt out, opt you in by default, use hidden menus and bible length T&C’s. The use by security services of these systems will never be fully disclosed to the public at large.