@James Gasik The monster manual has this tidbit. The PHB similarly calls it out with truesight.

TRUESIGHT
A monster with truesight can, out to a specific range, see in normal and magical darkness, see invisible creatures and objects..."

So truesight is calling out magical darkness as something it will allow vision in. It's not proof, but it's another hint that magical darkness is intended to stop darkvision.

Devil's Sight the warlock ability also calls out magical darkness.

"You can see normally in darkness, both magical and nonmagical, to a distance of 120 feet."

I think it's pretty likely that the intent is to call out magical darkness as something you can't see in unless the ability specifies that you can see in magical darkness.

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