Maybe those old people could still use the cycle lane if they had decades of exercising their muscles and joints on a bike instead of sitting in traffic in a car.
The lane also provides mobility for people too young to drive, unable to afford to drive, or those who prefer not to drive.
Fuck teenagers who want to get around without their parents though right? Fuck the kids who can safely bike to school though right? The old people can still drive, they didn't rip out the car lane.