not fair. it's not a normal service. it's a transportation service. If I can't travel on date X, traveling on date Y may be useless.

One could argue it would be useful for another trip to a different location. Sure. But because airflights prices are so shady (prices changing every day, prices that are different if you have a VPN connected, etc etc), the voucher could make you choose for the worst price.

That doesn't seem fair to me tbh