I find the "not enough time to do Heisig" argument one of the most common, but also the most laughable. It's a classic case of lack of perspective. Time invested in RTK saves time in the future. It is the foundation on which everything else stands, or the framework into which everything else fits.
I have seen this in my own Japanese studies. I trudged along for almost a couple years before RTK. Yes, I was learning, but slowly and painfully. I don't remember how I first heard about RTK, but reading his intro was a revelation of how I could logically, efficiently, and easily structure my Japanese learning. And I was right: my Japanese has exploded since finishing RTK. Vocab, readings, grammar, scanning, daily necessities, etc. while impenetrable before are now infinitely easier.
Besides the methodology of his learning, Heisig's main point is that learning can be tackled systematically for a much greater sum than by trying to learn everything at the same time. Language seems to be one of the only areas where most people refuse to believe this is true, but Japanese especially is perfectly suited for it.
I have seen this in my own Japanese studies. I trudged along for almost a couple years before RTK. Yes, I was learning, but slowly and painfully. I don't remember how I first heard about RTK, but reading his intro was a revelation of how I could logically, efficiently, and easily structure my Japanese learning. And I was right: my Japanese has exploded since finishing RTK. Vocab, readings, grammar, scanning, daily necessities, etc. while impenetrable before are now infinitely easier.
Besides the methodology of his learning, Heisig's main point is that learning can be tackled systematically for a much greater sum than by trying to learn everything at the same time. Language seems to be one of the only areas where most people refuse to believe this is true, but Japanese especially is perfectly suited for it.