Believe it or not, that's how many of us were taught to fly over 25 years ago. Goodness knows what's being taught in flight schools these days? Back in those days, you were taught Power + Attitude = Performance. When flying visual, all you need is your tachometer for your power setting, and the earth's horizon for your attitude. I remember my instructor covering the A/H, ASI and altimeter when coming back from the training area. You learnt very quickly how to fly by attitude that way.