And actually also about three degree approaches, but they ARE appropriate when flying an instrument approach.
Yes, and unless the approach specifies an approach profile that differs from 3 degrees you are likely to fail an IMC or IR renewal!!!
I appreciate that keeping above the glideslope is good practice for a visual approach in VMC in a single, in IMC under instrument conditions - NO.
But that's obvious - and why it's good to fly a twin!!!