Especially with some new products that don't have any specs-you are just supposed to "believe" that they will do the job.
At least that way the manufacturers don't have to be held to anything.
Here-drink this --------------------
I have been following this exact issue for decades and it is not getting worse (probably), while there are always new wet behind the ears customers coming along, and new sales people who make faulty claims as much out of their own ignorance as bad intentions. In my decades of experience where I have even had to correct my own salespeople, I never found bad intent, just good intentions and a failure to understand the underlying physics.
The unfortunate reality is that trying to apply (round) continuous sine wave specs to (square) varying music behavior is like the proverbial square pegs in round holes that don't fit neatly. Since marketers are forced to put those square pegs into round holes there will always be confusion and imperfect correlation to real life from using simple published data specs.
I do not see evil intentions from the majority, with only a minority of industry white knights who speak truth, but many businesses trying to survive by selling product to consumers who are never going to do the homework to fully understand complicated specs. These ignorant consumers reward products with specs presented in ways they "think" they understand.
This difficult hard to win situation is why forums like this are so valuable for the few customers who do want to understand and try to learn from the experts here. Over the decades I have found it impossible to educate every single customers before they make some bad purchase decisions out of ignorance. That is the unfortunate reality and harder for value brands than lower volume premium brands that begin with better educated customers and have more opportunity to explain details to them.
JR