I can relate to your point in general. The Internet is indeed quirky and glitchy, while TV generally works even for the elderly. However...
> My TV always works - it never buffers, shows glitchy video, or requires a page refresh (or god forbid a reboot).
... I guess you haven't had an IPTV setup, yet. :) I did (I have FTA DVB-T now) and buffering + glitchy video is a reality more frequently than I'd expect. Reboots are also necessary and were really deal breakers, as I didn't have RF overlay.
One could argue, though, that IPTV is more Internet than TV, or at least has the bad part of the Internet leaking to the TV realm and adding quirkiness. It's true. However, as mentioned above, now I have DVB-T and, god, buffering and glitchy video are even worst (but that's politics and clientelism, which is different matter for another discussion).
My point being: considering that TV "just works", nowadays, isn't really so clear-cut. Digital transmission and encoding, all these apps and added value with the extra capabilities of set-top boxes, yadda yadda, actually made it worse! Talk about having technology pushed down our throats (and to no advantage!). We just got a worst experience - it's a great example of how much telcos (IT in general, I'd say) aren't customer-centric.