I think if you want to memorize it, you can. I would not rely on it as a primary way to store your seed though. Memories are not perfect. What happens if you get older and your memory starts to go?

It is not impossible to steal something out of someones head. What do you think torture is?

Hardware wallet to deal with any management needs and steel for seed phrase backups. It will outlast you and your memory. It will outlast house fires, earth quakes and nuclear apocalypse.