That kinda defeats the point of having a device. Sure it works in some cases but we're talking about a soundbar here and that has to interact with other devices. It's whole purpose is to interact with other devices.
Even if it doesn't need to contact the internet you're still going to want it to connect through cables. There's good reason to connect through bluetooth.
But why should it contact over the internet? Well it sure is nice to be able to stream music from my NAS. There's utility in that. There's also utility in the parent company updating firmware to support new audio codecs. Or to support new algorithms. If my device is gaining more utility, that's a great thing! And of course, if it is connected wirelessly in any way (including bluetooth) I sure as hell would like updates with respect to security.
Without this, the thing becomes e-waste. The environment moves. Time marches on. No thing can exist in isolation, no matter how hard you try. Again, software rots, not because the software changes, but because the world does.
But that's not the problem here. The problem is abuse of that power. It isn't for the benefit of the customer. The problem is managers pushing to release before things are ready. The need for speed with no direction. To not even consider in the calculus of decision making the tremendous costs of when things go wrong. And how this lesson is never learned despite facing the problem time and time again. Issues like this now cost tons of engineering hours, tons of lawyer hours, and ultimately will cost tons in rebates and refunds. How many weeks of work is that equivalent to? Sure, it doesn't always result in catastrophic failure like this, sometimes it results in smaller failures, sometimes small enough they can be brushed off. But those are still costs that no one considers. That's the problem here.