You're missing out on resolution (4K) and picture quality (HDR, contrast ratios, color gamut) improvements by doing this.
Not everyone suffers from FOMO.
I've only seen one movie that was worth the bother and expense of seeing it in 4K (Rear Window).
The rest of the things you mention are mostly for a very small slice of theoretical people with perfect vision in perfectly lit rooms at the perfect height and viewing angle.
Beyond icons on a sticker checklist, they mean nothing to the 99% of people who just want to watch sportsball or eat popcorn while watching Disney films with their kids.
You can put lipstick on a pig, but most people are still watching pigs.