I'm not as optimistic as you are. In audio there is correct and aberrant, with varying degrees between the two. What we need is less brands and quite a few marketers and MBAs getting pink slips.
What we need is good audio gear at the correct pricing for the markets. We need to stop insisting that a whole bunch of channels is nirvana. It may be for some, but can't be done on the cheap. and unsuitable and a down grade for many if not most rooms.
So we need a return to 2 channel. May be 2.1 in the "affordable" and family friendly range of gear.
Things have gone well and truly off the rails. I'm sure all the MBA types spun the story it would be like the introduction of stereo back in 1959. As usual they were wrong and now far less homes have decent audio than they did forty to fifty years ago. Good work all you MBAs and marketers!
You're ignoring the fact that nothing is perfect and there's no way to make perfect speakers. Further, and you should know this- human hearing isn't consistent across the population, so even if you were to make speakers that are as close to perfect as possible, the inability of many to hear that means you WILL hear "I don't like it". As much as Drs Toole, Olive, et al showed that many people have similar preferences when they hear loudspeaker demonstrations, those tests weren't for critical listening, AFAIK- that's a learned skill and it's not one of the easiest to teach.
Consider the preference for abberant speakers 'personal preference'- it's probably the only thing that can help a speaker designer maintain their sanity.
You're really underestimating the power of suggestion- it's the basis for all advertising and then, there's the inabilty of most people to see when they're being fed lies- "If you can't impress them with logic, baffle them with BS" was coined a long time ago and it still works.
As I have posted many times, too many people have been conditioned to believe that more & bigger equal better, so they spend more than they should on crappy mass-marketed systems and systems that were badly 'designed' by people with no technical background at local stores- I have worked with people who could have picked up a few books and learned about this, but management were very happy with them as they were because they had were closing more sales than the others. Training costs money, dealing with a few dis-satisfied customers is easier, in some ways.
The movie industry can't make better product, so they use flashing lights and sound effects to impress people. That's not sound quality, it's mostly noise.
One of the worst lies told by the AV industry is: "More channels sounds better and it's easy to set up a home theater".
If it was so easy, everyone would have a system that sounds and looks great, but that's not the case. The problem is, most people don't know the difference, so the industry goes on its merry way and trowels out their crap.
Another insult to customers- when I started selling audio in early 1978, the failure rate across the audio market (there wasn't much to Video, aside from TV) was 1%. Now, IIRC, it's closer to 2%. 1% of a much smaller number was tolerable but 2% of the current sales volume means the defective equipment could fill whole container ships.