Many people also don't want their screens "forced" into 16:9 fullscreen because the original picture quality is often not that great with an SD channel.
Of course the picture quality is not that great with a "forced" degradation to a 4:3 letterboxed pseudo-standard definition channel. That is exactly my point.
Standard definition was based upon 480 lines.
What you are referring to only has the equivalent of 360 lines because of the black bands of wasted resource at the top and the bottom. That is not standard definition is it SUB-STANDARD definition.
With a 33% improvement in definition (from 360 back up to 480) you may well find that some of those "many people" will change their opinion.