For most people in crypto he is right.
[~snip~]
Remember, we have a majority of users with few computer skills. They are in for the craze and the moonshots and meme coins.
Imho this is the correct view over what Andreas said.
I'll only add that with a tiny bit of ingenuity the seed can be hidden in plain sight, which is not that much possible with the private key, also the seed is less prone to typos.
But the main reason is being dumb-proof. And for that the solution at hand is seed and HW.