the reason its "dangerous" is that it can (and will) report the GPU to be 20C and turn off the fan.
however, if you want to make "slow" (instead of off) the default fan speed you should be fine. Then when getting ready to game crank up the fan speed to full blast.
It has worked quite well for me
As for what your missing, the laptop by default just loops the fans off/full blast with a wide range of temps, I prefer a more stable solution than letting it take control.