I think people criticize that line in the zen of Python because Python has now become very maximalist. On it's own merits, I think "There should be one obvious way to do it" is much better, less clunky, than "There is an idiomatic way to do it".
Also, importantly, the Zen of Python is kinda written as a set of ideas that Python should aspire to ("there should be one obvious way to do it") instead of a sales pitch of Python's merits. I prefer that.
It all sounds great until someone writes nested list comprehensions. They are the recommended, idiomatic way to things most sane people would use ‘map’, ‘filter’, and ‘reduce’ chains, although chains are another thing python very much dislikes.