"It's just like the time I lost my car keys and need to buy a new car next day."
"It’s just like the time that I lost my house keys and had to move into a homeless shelter."
"It's just like the time I forgot my personal question to my 401k account and I got locked out forever, nobody could help me, and I lost the entire balance."
Unlike all the efficiency and speed questions, this part here is a stated, inalienable objective of Bitcoin and other cryptocurrencies. This is the expected behavior. Some clown designed it to work like this. Imagine grandma trying to use this. Remember that time PayPal locked your account and you were so mad you couldn't get at your $600 for a few weeks? Now imagine you lost your life savings because you can't remember your password and literally nobody can help you now, or ever again - and thats the point.
I'd imagine it'll destroy itself anyways, it seems like any random walk ends in 100% of coins lost to human inability to preserve access.
Who cares how amazing the system is technically? It's designed to be actively hostile to human users.