The TVs I’ve seen that do this have been smart enough to not get naggy about a lack of Internet until 30+ days after first power on. Then you get popups or autoplay videos begging you to connect it.
My Hisense has been pretty decent, surprisingly. But for my next TV I’m honestly thinking of going with a commercial display.
I’m tempted to do a master reset on mine to see if I got that option. I have the Roku edition and I know that I can specify what source it defaults to on power on. I can also turn off content recognition, which is what’s going on in OP’s case. But using it as just a dumb TV would be awesome.