They're making bitcoin more valuable because they can't be retrieved anymore. It is what satoshi has said and thank you for quoting him with that.
I think others still don't understand what the lost bitcoins help to the community and in its ecosystem.
What comes to their mind is if someone out there is able to crack all of those wallets and still retrieve those lost bitcoins forever but, that's unlikely.
It's true but people must know of another more important thing. Bitcoin value comes from its technical and operational things, without them how many bitcoins lost is no longer important and don't contribute anything considerable to Bitcoin value.
That's right, coming from the mining operations that's happening and the power that these asics consume, the value is within those as well.
We can see it with altcoins, they are too much, from altcoins as Bitcoin forks to non Bitcoin fork altcoins, and their coins or tokens can be lost or burned in millions, hundred of millions but their values are zero or very low. It's because these shitcoins and tokens don't have things to make up their high values like Bitcoin does have.
If there's no support they mean nothing. And even they've got a little to a lot of supply, that still means nothing if there's no source of their value.
We all are seeing the importance of how the value of Bitcoin is given and it's all interconnected from the miners, to the investors, holders, institutions and others.