I've been programming using DVCS systems for a living and in teams for quite some time, and know exactly what level of effort you need to put into your DVCS usage to make it easy for other members of the team.
I didn't say your commit messages should be "a" or "stuff", but there is literally no need to be super careful with your single commits, as long as you work on feature branches.
If you're not using feature branches (you should) you must at the very least make a very good commit message, but really you should be using feature branches. When you create your feature branches the name should be clear enough that you don't need to read the commit messages to understand what it's about. Any additional information reviewers might need can be attached into the PR, and the task/issue related to the changes.
If you directly make a single commit to master or similar for your whole feature, you're doing it wrong.
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