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Only you care about your definition of 'suboptimal'. Pro, amatuer and casual camera users are increasingly using phones instead of pro-compacts as production and usage stats show.
I receive iPhone files alongside D4 / 5D files regularly from the same professional photographers and have no problem preparing them for 300dpi print. These are pros who would have carried a GR1, GRD or similar and now use their phones.
That's not quite what has happened.
You said your experience is typical. I showed how it probably isn't. No need to get sarcastic or excited.