If you don't care for any of the modcons of a media streaming system similar to Netflix, etc. then more power to you, stick with a SMB share. It's undeniably less that can go wrong and god knows these systems can become a janitorial hell sometimes.
However I hope you can see that there is a plethora of benefits that others may enjoy from it. Otherwise, this kinda feels like the classic HN Dropbox critique.
I am definitely in the former category. I’m not dedicating the time to replicate a Netflix client equivalent with all the metadata (although I do make the time for FLAC albums). There’s nothing as straightforward as directories and a SMB conf file. Plus, you name individual files however you want.
I have straightforward SMB shares, but two distinct groups for movies. The first is standard bitrate, where everything is 1080p SDR h265. The second is for 4K HDR, higher bitrate. That second group is only for a small number of movies that I like very much, will rewatch, and have cinematography and visuals that justify the storage. If I love a movie but it is mostly an indoor dialogue affair, there is no point in it being in the second group. There is duplication between the two groups so I am covered if I want to watch the high def version at home on my large TV connected to my Pi NAS via Ethernet, or the standard def version around the house (usually working out) on a mobile device (or possibly on the road via my Tailnet).