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?
If technology (especially quantum computers) develops and the value of bitcoin increases exaggeratedly, some may try to (restore) some of the old bitcoins as they were sent to the public key directly (P2PK.)
Other than that, as long as you are generating seeds randomly, you are not sending from your cold storage address, it is impossible for anyone to spend your money other than you as long as no one knows the seeds but you.