I think so. The detail is all there, even if spread into the comments; it's what they are for. If further expansion is needed, why not just ask the person who wrote the answer to expand it? But, as you say, if this is only for the sake of third parties, can they also just read the comments? Or, ask in the comments for clarification themselves?
[Added, as requested] If others are satisfied with the answer and worth upvoting, or even giving the little tick, then this should indicate something about the quality of the answer in they eyes of other users. One should perhaps pause before writing what amounts to a page or more of detail. Sometimes these things seem important at the time, and sometimes after a little reflection it becomes clear why a short answer was completely sufficient. Or, it really wasn't obvious, and there was a trick that, once understood, made things a lot more clear. Then it might be that the trick is what is missing, not routine detail.