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?
Just ask yourself, why would the Bitcoin community decide to do such thing?
Will this bring some sort of benefit for the entire BTC community? Some Bitcoiners might recover their access to lost BTC(if they provide sufficient proof, which is highly unlikely to happen, in 80% of the cases), but the Bitcoin price will go down. We as a community will lose money, just because we want to help the people, who were irresponsible enough to forget their passwords, sees phrases, private keys, sent BTC to the wrong address, etc. Rewarding the irresponsible people and punishing the responsible people? This sounds like dumb socialism to me.