Is the question if Johnny Walker Blue Label is worth the cost or if a blended Scotch worth the value of a decent moderately priced Single Malt Scotch on any given night? I get the impression that the whole purpose of this thread was to prove that Single Malts are always better than blended Scotch. In some ways that true, but almost none of the people who replied negatively seem to have actually let the bottle oxidation take place. So of course they didn't see the $180-200 value in it.
If I'm planning to drink 3 or 4 shots worth of Scotch I can go for Red Breast 12, Glenfiddich 15, a Glenmorangie Special Edition, etc. Sure I regularly drink and enjoy those too. Here's the thing though; you don't pay the price you pay for Blue Label to drink it in one night.
Buy a bottle...drink some. Let the bottle sit 2 or 3 weeks then drink some more. Let the bottle sit a few more weeks then drink some more and so on. The variety and quality of the blend can't possibly be appreciated without letting it breathe. If you're willing to let the bottle change its taste the yes of course it's worth the price.
But if you're strictly into Single Malt Scotch and don't have the patience for all that waiting then Blue Label is clearly a waste of your money.