Apple isn't going to put a browser, or allow a 3rd party browser, on the AppleTV.
.
I don't think it will ever happen either, as there is very little incentive for Apple to have Safari on the ATV.
Well, other than many of their customers want it.
The way Apple sees it the ATV is a video streaming device... period.
I don't think this is necessarily the reason, as many other streaming devices include a web browser.
IMO, the reason why Apple probably will not put Safari on tvOS is because this creates a way to bypass the App Store, and Apple loses some control over things. This also risks cutting into Apple's App Store revenue.
I think the OP will, but the OP was just wondering about alternatives to AirPlay. It is a valid question.
Personally, I would much rather have stuff play natively over the ATV than have to AirPlay it, and I think the OP feels the same.
Some websites block AirPlaying, there tend to be more playback problems with AirPlay than native playing, and it is just inconvenient to use AirPlay when compared to native playback.
What makes you think that content wouldn’t be blocked in an TVOS browser too?
Maybe this might be the case, but maybe not. But, that really isn't the point.....
I think the real question should be, as an user why would a tvOS web browser be a bad thing?
For example: Comcast has a very good streaming app that lets you watch their content on small screen iOS devices. But you can’t AirPlay it.
This is true for the Xfinity App on iOS devices, but you can AirPlay Comcast content using a browser on a Mac.