I don't really get why you think storing some random words is so much more user-friendly then storing a wallet.dat-file, or PKs.

And I didn' say "we don't need BIP39", you might need it, even I might,
I didn't say it's not useful.

All I said was, that we didn't need it in 2009-2010 to store our keys, there were other ways.

Even franky didn't say bitcoin did not evolve, he just said it worked from day1.
You were the one questioning that.