I can see a situation where a campaign centers around making monsters feel threatening and intentionally depriving a largely martial party of magical weapon. I've never ran a ghost or werewolf that is actually a problem due to either a spellcasting party or I already offered magical weapons. I kinda wish I had, because it would make that item feel much more exciting.

Meanwhile there are items like cast-off armour that don't really offer a major mechanical bonus, or even just an artificer or forge cleric making their armour magical themselves.