One the one hand, ubiquitous encryption is simply required for security on the internet. Things like lets encrypt and warning on http are great improvements.
On the other hand, the owner of a network has some right to look into the packets on that network. Especially if the owner of the network also owns the end-points of that traffic. My main use-case here isn't corporate networks, snooping there makes me uncomfortable.
Really, my issue is stuff on my own network. I want to see what my TV sends home. Same with an amazon-echo, or really any IoT thing. Yet, if they all use SSL and don't allow me to add a root CA, I can't look at what they run.
A user has no control over an amazon echo. You can't modify the software because the bootloader is locked down. You can't inspect the traffic because it is SSL cert-pinned. Amazon can push updates to it at any time. All a user gets to do is decide whether it is turned on, and whether it gets a network connection.
Really, what I would want to see is the option to install a CA cert on any device I own. At the same time, that is a terrible idea. Every 14 year old with google is going to find some stack-overflow answer that'll tell them to MitM their TV to do some simple thing.