Seriously you do have a point, just not a good one. I have sold high end audio for decades and you are right in that the ears play a huge part in what a person needs. I have demo'd systems for people who can't hear the difference between a high end RBH or Totem speaker and a $499 big black box speaker. Often they feel somewhat embarrassed that they don't understand when I am describing sound stage or forward vs reversed presence, however I look at it like being a cheapo drunk, nothing wrong with that. If you can go to the pub and have a good time all night on two or three beers, all the power to you! If you can hear a slight difference but not enough to invest $12K in speakers compared to a pair of $500 speakers, that's great...I guess.
This doesn't detract from the fact that there are MASSIVE audible differences between cone types, basket design, cabinet density, even the type of capacitors in the crossovers makes a world of difference to me (I love foil wrapped capacitors over poly pro ones). I can hear two speakers side by side and tell you which uses the better capacitors.

Sometimes it's a bitch because I hear artifacts in recordings that kill it for me but others think it sounds great. It's just like how I spend more on drinks when I go out at night because I can't drink cheap scotch and even the beers I drink are the priciest in the bar and I drink more of them than the cheap drunk who has two draft.

But we all know there's a big difference between Johnny Walker Red and Glenmorangie Malaga Cask scotch. It's just a matter of your taste as to what you can get away with.