no one said the ranger or barbarian or paladin out of combat stuff wasnt a problem. Not sure why you would compare a fighter with out if combat problems to other classes that have them too, albeit to a slightly lesser degree.
I'm not comparing fighters to other classes, exactly.
It's actually an attack on the skill and tool system.
Skills and Tools that would be seen as fighterish don't exist in 5e.
Architecture
Geography
Nobility
Streetwise
Trade
Military
All missing. All there are are smith's tools and leatherworker's tools.