"Furthermore, people who only know how to drive automatics are also automatically inferior drivers. The same as those of us who don't know how to double-clutch properly are inferior compared to those who do.
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I know how to double declutch... owned several cars with no synchro on 1st and very little on other gears. I have driven but not owned, a car with straight cut cogs which required a LOT of care to even change gear let alone do it without a crunch
But I dont do it... why should I. Both our cars have excellent synchromesh, well chosen ratios, and good clutches... AND, importantly, enough torque to obviate the need for many gearchanges.
Double declutching is one of those things that off a race track is only marginally useful in extreme slippery conditions.
Matching revs on a downchange on a slippery surface is another matter but that extra dab on the clutch is just pointless on a car with a modern gearbox.