Scribe
Legend
Like @Scribe stated it's about numbers.
50% odd is okay for attacks when you get 2 of them a turn and are drilling down an HP bar.
But when you are rolling Out of Combat with a Poorly written DMG with few examples in the most successful RPGs every with a community of New DMs who lack experience and Old DMs with harsh failure expectations of older editions...
50% odds is not so great.
My rogue is floating in the Plane of Blood due to a failed Cha check then failed Cha save. Drowning in blood.
Right, its not great, its a coin flip.
So just like I've been pushing in a number of threads.
What are the assumptions?
What is consistent?
What are the metrics of success?
Should we be passing 70%?
Is 'expertise' in a subject 90%?