Well yes, for things that tend to stay in the same place no need use Bluetooth at all. Not denying any of that, but which of those are issue that have to do with Bluetooth?

>But also, in general, they say perfection is reached when there is nothing left to remove. Extra features often mean something is wrong with the design.”

Perfect is the enemy of good here. Bluetooth wasn't meant to be the perfect way of connecting devices, that's impossible, it was developed back in the late 90's for connecting millions of mobile devices to each other over a standardized, cheap (in terms of silicon die area) and most importantly, low power connection (batteries were small back then), and it does all that pretty decently. Sort of a jack of all trades master of none.

If you're looking for perfect solutions then you should be looking elsewhere and that's why proprietary solutions exist and there's nothing wrong wioth that.