My questions is that ' is there any possibility that some point in time in future BTC community might decide something which can retrieve this lost BTCs?
The coins lost cannot be retrieved as you need the keys for the same and only the owner of the funds have it which is why it's said you need to secure it properly on your end.The supply is shrinking due to these lost coins and we all know there will never be 21 million coins in circulation which will boost the prices even more when demand gets too high.