People are regularly forced to convert paper money to new notes or lose the value. It is the exact same principle.
Most countries also have principles to apply to abandon properties and accumulated wealth with no inheritor that in the end returns it to the state.
Are these also unfair practices?
If you like state-issued fiat money with state rules, stick with that. Why try to recreate a failed system?
As has been stated numerous times, this is a hard fork - so go ahead, make the changes you propose, release them, fork the blockchain, and see how many people follow you to your new alt-coin.
Many people are hoping someone someone actually follows through and does it instead of talking about it and doing nothing while expecting someone else to do the work for them. The code is on github. If everyone follows you'll be a hero.