It is even possible to built the csp2 with a remote control for the volume?
Im not sure the reason behind it for not having one. Do people just get up just to adjust the volume?

I use my CSP2+ primarily as a headphone amp.

This unit has a very wide dynamic range, meaning that you can hear the highs and lows comfortably without having to re-adjust the volume.
In practical terms, I can set the volume at a certain number of clicks (coz mine has the stepped attenuator) and not have to adjust the volume again for 99% of the time. The 1% applies to a few songs which were recorded at a very unusually high volume to begin with.
Having a wide dynamic range is the result of how well the CSP2 was designed!

Some audiophiles also believe that having a remote option will degrade the sonics of the said equipment. Maybe this could be the reason?

Or maybe it is because of a lack of space in the wooden base?

As Lon has suggested, if you pair your CSP2 with a source with remote, that will serve as a remote "option" if needed.