Fanaelialae
Legend
I see. So you're okay with a party of fighters stabbing the Tarrasque in the toe until it dies, as long as they're armed with +1 swords? That seems like an arbitrary distinction to me, but to each their own.To clarify. Mundane, without any support. Yes, a party of 4 Fighters with no magic gear or support, should get trampled over.
Smaug may have been killed by a Mundane action, but there was certainly plot armour involved yes?
No. That's not a use of plot armor that I've heard before, though I believe I follow your meaning. Smaug was killed by a highly skilled archer shooting it in the heart. I'd say it's no more an example of authorial heavy handedness than you'll find in plenty of classical works of fantasy. There are a multitude of situations where Conan shouldn't have realistically been successful, for example, but he was because failure in those moments wouldn't have made for as entertaining a story.
Similarly, if a campaign centers around a knightly order and it's draconic adversary, it would be an extremely lame end to the campaign for the DM to say, "sadly, because you're all just 20th level fighters and the dragon is 50' long, your attacks are utterly useless and it eats you; campaign over". D&D has traditionally supported such campaigns, so I don't see why it wouldn't continue to do so.
But it does speak to the idea that high level fighters aren't really all that mundane. Those who prefer the fighter to be mundane seem to sometimes internalize those not-so-mundane aspects (the effects of high HP, being able to slay monsters the size of a 747, etc) to a degree where they just ignore it, while decrying anything new that would surpass the limits of what a well trained mall cop should be able to do.
