Hi. I think most "western" comic and "webcomic" I found is usually coloured. Perhaps this "trend" (if it is a trend) made some of us think that if we don't use colour it will be "lifeless" or "lack of something".
Do you read Japanese comics (manga)? Most of them are black and white with grays or screentones. I think these black and white mangas could speak louder and bolder even without colours. I even would not have it any other way.
Regarding me, if I need to do colour, I just do it (it's nor least favourite or most favourite). This might be a subjective preference but I do really enjoy doing black and white and trying my best to "speak" with only with them. And my upcoming comic will mostly be in black and white.
It ultimately depends on what you want to tell. If you think adding colours is only making it a tedium, then don't.