D&D 5E Why Are Rangers Arcane Spellcasters?

[Vael]

Arcane - The Weave ?

Maybe? I did think Arcane = Planar magic, so it's a catch-all for feywild, elemental and so forth.

To me, though, the Weave is the access point for all magic, and it's called "The Weave", so I tend to think of it as made up of strands of the various power sources.

 

[Olgar Shiverstone]

Is that a bad thing?

It is tradition.