You misunderstood the concept when someone has lost his bitcoins forever. It will actually help to make the remaining bitcoins rare because the supply is lesser.
And that means, a higher price for bitcoin.
Hmm, I smell an incredible price-jump in the future
Yes, and that is the reason why everyone is saying
HODL. Save as much as you can, we just went through the halving and the cycle after that is common for most bitcoin holders. But if you have no idea, check the history of the 2 halvings on 2012 and 2016.
All right. The fewer bitcoins circulating in the world, the higher the demand for them and, accordingly, the higher the price.
Obviously, over time, bitcoins will become smaller due to the fact that people will lose access to their private wallets or, as you said, in the event of death.
However, most of the people will surely be safe for this case, especially exchanges that own a huge number of bitcoins.
The bitcoin deficit will increase in a natural way, which will make this asset especially desirable.
I am sure there will be many more forks on this subject.
In case of death, I think we have our own plans of how we will introduce our private keys to our parents, children or immediate relatives. But, I'm not thinking of that, don't think of it so that we won't have worries in our minds which might be the actual reason why we'll be in stress.