I don't see thus as an argument against rebase. In fact, rebasing your branch interactively allows you to examine the conflicts, if any, in the context of the feature branch and fix them. If you merge the base branch into your branch, you get a mix of changes that are hard to reason about in the context of your feature branch and the automatically generated commit message doesn't provide much information about what was done to resolve any conflicts.

On the other hand, its a lot easier to see if a conflict resolution attempt didn't work during a rebase because the individual commit diffs and the overall diff would make obvious (e.g., unrelated code in the master branch was changed out removed).