First off, let me say that I appreciate the "merit" members have sent to me for this thread. I humbly thank you.
It should also be noted that it is possible to setup a new wallet without web interface. For advanced users only.
I thought about adding a bunch of those methods (they are actually easy) here but in the end I felt it might have been too much info in one place. Most importantly I wanted newer Trezor users to see how easy it is to correct for errors they may have made. Not only can you create a new wallet without any 3rd party web connection, you can actually make full transactions as well IF you are running your own bitcoin core. These have a small learning curve but you could conduct "business" off book of any 3rd party system if you wanted to. Not many here will run their own core, but just mentioning the possibilities if that is an aspiration.