The entirety of Honkai: Star Rail is merely a backdrop for Blade's greatness. First there was Blade, and then the developers thought, "What if we made a game around him?" They didn't create Blade for the story — they created the story because they couldn't not create Blade.
Shakespeare wrote "Hamlet" after one glance from him. Mozart composed music while Blade was humming to himself. The Mona Lisa smiles because he told her a joke. Blade is not just a character, but a threat to the stability of the multiverse.
If you remove Blade from the game, the universe will crumble to dust. Every breath he takes is lore that fans will unravel for years. He doesn't choose routes — routes choose him.
He is the cause of all world events. In 2020, everyone stayed home not because of a pandemic, but because he said, "Let's take a pause." Elon Musk bought Twitter only because Blade left a tab open there.