I just stumbled upon an extract from the book "Zen mind, Beginner's Mind" that fits the question very well! I'm sure this quote from the book will save many smart or intelligent people from wasting their time!
The best way to develop Buddhism is to sit in zazen—just to sit, with a firm conviction in our true nature. This way is much better than to read books or study the philosophy of Buddhism.
If you want to be a sincere Buddhist, the best way is to sit. We are very fortunate to have a place to sit in this way. I want you to have a firm, wide, imperturbable conviction in your zazen of just sitting. Just to sit, that is enough.
Reality cannot be caught by thinking or feeling mind. Moment after moment to watch your breathing, to watch your posture, is true nature. There is no secret beyond this point.
Of course, "the best" are just relative 2 words that the authors try to simplify the whole book but I thought it'd be useful for the "mind wanderers" like me to settle down. Knowing that it comes from an expert, haha!