Peter,
Thanks for posting
Personally I don’t subscribe to what Roger Clarke or even Tony Hallas say in regard to Astrophotography
One person I listen to what Ivo Jager says, an extremely clever and factual individual who developed Startools
Refer to link below….
https://forum.startools.org/viewtopic.php?t=912
Colour in Astrophotography is very subjective and always will be. Nothing wrong with Ha dominant images ,to me it’s the detail and resolution that takes priority over colour. Although colour especially Narrowband does provide an image with the Wow factor.
If I looked in my eye piece at M42 and saw a beautiful coloured nebula with shades of reds , greens and blues then that could be the basis of natural colour in celestial objects. Unfortunately my eyes just see a black and white picture show ( which is still beautiful)
Cheers
Martin