I think I understand where Eric is coming from.
In my view, it is all right that there is a wide range of speaker technologies, ranging from ultra-efficient to very much inert such as certain panels and plasma tweeters. They all have their unique sound characteristics, their inherent strengths and weaknesses. So we have a wide range of choice and experience.
However, what I find sad is the fact that there has a been a trend to make such speakers hard to drive which necessarily need not be hard to drive. That tendency was fueled by folly to imitate the more expensive hard to drive technologies with the much cheaper regular electrodynamic drivers - just plop in a crossover to kill the output level and suck out the amplifiers energy and waste it as heat. That way manufacturers can boast that their normal speakers are now hard to drive, just like the coveted hard to drive technologies.
What the unsuspecting customer is unaware of, is the fact that their inefficient beast would likely sound much better if it had been designed with a proper crossover, and used proper driver complement in the first place. As, the second reason for speakers being inefficient is that the driver compelemnt does not match each other and the designers need to use excessive crossover EQ to match them, So, effectively, covering up poor parts choices (which are always driven by the lower cost).
Now, as far as getting these insensitive speakers at low prices - there's nothing wrong with that. The folly is though, that these badly designed speakers are often sold at a premium.
Now, that's the reason for rejection. But I do understand varietas delectat, and people while being very frugal im most situations, are willing to be completely vulnerable when it comes to well-marketed products.
After all, who would question the integrity of such companies, as for example B&W?
PS: while a high power amp CAN drive a 2R load, it sounds much better, with a fraction of distortion driving an 8R load..... had that 2R speaker been designed with proper driver complement & crossover, it would sound significantly better with the same beast of an amp...