Personally, I would pay more for a TV without this functionality. I'm running one of the last "dumb" consumer TVs, from 2015.
But the overwhelming majority of consumers just want smart TV stuff built right into their TVs.
It's like power windows and air conditioning in cars. They used to be premium features. Now, you really can't buy a car without them, at least in the USA.
(Pedantry note: As late as ~2014, you could still buy a Nissan Versa with manual windows; perhaps it's still possible)
for myself, having no 4k hdr, no netflix, apple tv, youtube, bbc, and many others is a deal breaker when it comes to buying a new tv.