I love my LG OLED TV, everything I need is on the remote.
Back in the 00s I had a nice setup with a networked media player (connected via SCART back then) that could play my DivX/XviD DVD rips from a network share.
These days I have a NAS running Plex with an Apple TV 4K (2nd gen) and use Infuse for playback that happily plays back 150GB 4K HDR Bluray REMUXES over the network instantly. Also it is accessible anywhere I have internet so I can access my whole media library on a phone, tablet or laptop while away as easily as I can Netflix.
I use my LG "smart" TV like a dumb TV. I don't let it have internet access as it doesn't need it for how I use it although it is connected to the network but it has its own blackhole VLAN just to stop the "connect your TV to complete setup" message it always shows.
The LG built-in system is actually pretty nice (and the reason why I buy LG TVs). Netflix and Prime Video are a click away. If I have downloaded something, I just plug a USB stick or use the built-in software (SmartShare) to stream from my computer by WiFi. If I want to play some games in the Steam Deck, I plug it with an HDMI cable and it just works. If I want to show my kid a Youtube video, it's a little more inconvenient with the on-screen keyboard but not a big deal. By the way, I have a Sonos Amp connected through HDMI Arc, feeding two wired front speakers and two wireless back speakers, and it works with many versions of Dolby surround sound - I haven't bothered to check if this is easy on PC, but I suspect it might not.
Maybe it's just that I don't watch a lot of TV so I'm not fussy, but I haven't found any particular feature I would like to have that isn't reasonably easy with my smart TV, while I do find significant drawbacks in the PC setup (basically more stuff in the living room, why would I need a keyboard or mouse there?).
So yes. I'm a nerd, and I like my smart TV. Go figure.