The truth is that people actually loose access to their private keys and will loose their bitcoin
That's a personal mistake they made because they weren't careful in storing their private keys or perhaps they didn't understand that it was important to store their private keys in a safe place. These kinds of mistakes don't need to happen when people understand the use of wallets and in fact not many newcomers know what a seed phrase/private key is.
In the process and a lost bitcoin isn't even a disadvantage to the network but actually increase the value of bitcoin in circulation and so if you take all the security measures being shared in the platform for granted, you're putting yourself at a serious disadvantage because if you loose your bitcoin due to your carelessness, it's your loss and not that of bitcoin and I doubt their is a means you can use in recovering a lost Bitcoin without your private keys.
Such losses will impact individuals as people lose access to owning bitcoin and have absolutely nothing to do with the network. That's why people advise to be careful about private keys when you create a wallet because otherwise the risk will be quite big. Carelessness and shallow knowledge can destroy everything, therefore it is important to learn first when you want to get involved in bitcoin investment, whether it's how to invest, buy and sell or how to store it safely..