If everybody in the world moves to a Bitcoin standard everybody cannot be running their own nodes. Opening individual channels for 8 billion people even with some batching would crowd out other activity on the chain for years. Do the math.

Having something like islands of Fedi users connected by lightning channels is needed for a global Bitcoin economy. If that level of adoption is not a goal, and Bitcoin is only to be used on the fringes, we probably don't need Fedi.