On a side note, I also think you highly underestimate the technological advances that continue to be made under the infrastructural hood of the internet, b/c it's almost completely transparent. iPhone apps and websites in and of themselves may not be a big deal, but the growing scale of digital distribution channels and the level and scope of our interconnectedness certainly is. Not to mention, managing this growth in a way that is environmentally sustainable? Not a trivial engineering problem, and, in my estimation one of pressing concern...
I think that depends on the person and/or language.
My Polish grammar knowledge is now pretty impressive, but I'm having a terrible time trying to remember words, so spend the majority of my time attempting to force memorisation with flash cards.
In a way it's kinda fun - I can go through pages of grammar exercises, conjugating and declining correctly, but with no idea of what Marta did in the past with 101 of somebody's somethings.
I think this depends somewhat on the language. For some, grammar is the first major bottleneck to get to a usable beginner level, but for others, it's pronunciation. For example, Danish grammar is relatively simple (which is one reason Google Translate is very good translating it), but it's quite difficult for non-native speakers to pronounce it intelligibly. I've also heard second-hand that pronunciation is a bigger problem than grammar for beginning Mandarin Chinese speakers.
I also think humans on an individual basis are inherently unbalanced; that's why we're social creatures.
The problem w/ this prescription is that just b/c something is 'unreasonable' to us doesn't make it untrue.
Python: Guido van Rossum - masters degree in mathematics and computer science from the University of Amsterdam
Ruby on Rails: David Heinemeier Hansson - bachelor's degree in Computer Science
Ruby: Yukihiro Matsumoto - He graduated with an information science degree from University of Tsukuba
Linux: Linus Torvalds - master's degree in computer science from NODES research group
SpaceX: Elon Musk - From the Wharton School of the University of Pennsylvania, he received an undergraduate degree in Economics, and stayed on another year to finish a second bachelor's degree in physics.
...I could go on