[Sparrow]

You've got a point there, it's possible to make all the wrong decisions and still make money while picking up some bad habits. However more often than not it will show in your statistics and I don't have to think hard to identify what went wrong that day.
For a precise analysis video & journals are better, but if you just want quick results or find the days which you'd like to look at more thoroughly, stats are pretty suitable.
It depends how much effort you want to put into it.