I think how worthwhile that time investment is depends on the reach and longevity of the diagram. Sometimes you're only sketching something out to think things

I think how worthwhile that time investment is depends on the reach and longevity of the diagram. Sometimes you're only sketching something out to think things through and you'll get rid of it after 20 minutes. But if at other times, if you've got reference material that's being used to onboard people or explain your system to other teams, etc. that hour spent creating something more understandable probably pays dividends & worth the effort.