I often see claims like this from audiophiles yet the research with AB tests has generally found that no such differences actually exist.
https://hometheaterreview.com/why-do-audiophiles-fear-abx-te...
https://hometheaterreview.com/why-do-audiophiles-fear-abx-te...
Go to any audio store with speaker rows and listen to a few. They are hugely different, and none of them are cheap quality.
Which basically means that we are far from solving the accurate speaker problem.
The problem that we are far from solving is the problem of people buying inaccurate speakers.