For the examples I listed, the fact that they’re serviced by Amazon is an implementation detail. People are not buying it to communicate with Amazon, they are buying it to get something done. Many would probably be just as happy “to communicate with Google” instead. The point I’m trying to make is that Amazon is not the motivating factor.

Ok, but they are necessary implementation details... if you want to stream music on a voice controlled device, it is going to have to send your request to the streaming service

It doesn't have to be Amazon, but it has to be someone... and it makes sense the Amazon device communicates with Amazon services