Spending painful years in classes where we've been taught the grammar extensively I couldn't agree more with those people. Two languages, the same way of teaching and time wasted all the same. So I say, just skimming the grammar book should be enough to get you going. You can always come back to it when you read something and don't get the rules.
Indeed. I sucked at English (as a foreign language) in school. Real progress came from video games / books / later TV shows.
It's perhaps a slower way (unless you go to live for half a year+ in the country and don't use too much the crutch of help available in your languages), but not a harder one (ditto).
Maybe for the very beginning, when you first learn phonetics and alphabet/ideograms, where the "floor" is infamously higher in Japanese for non-~Asians ?
Incomprehensible to me. Learning the grammar of a language is the most fun part, in my opinion! Vocab is hard work, but learning ways to form a sentence? Magical.
It can work for some people? You aren’t so much not learning grammar as you are inferring the grammar via practice instead of up front studying the rules. Like the difference between training a neural network to compile code vs writing a parser.
Eh, worked fine for me in Latin. Well, until "Hannibal, with his friends, the Romans, traversed the alps". At least my teacher had her laugh for the year.
Learned Polish recently. It's the same. But people do try the supposedly easy way of learning it "without studying the grammar".