Walker Tennis Balls Tennis Balls On Walkers?

Tennis balls on walkers? - walker tennis balls

I understand the general reasons for this (no scratching on the ground, was) a step of "light" for hikers, but my question is, why not just build right on the tracks or why not special solutions buffer Walker to the same game how the balls? Is not it ridiculous that seems all the wanderers, the balls, but each being a separate accessory rather than part of the Walker / Sailing / floor? Or is there already, "" tennis balls measure this effect?

I can not imagine what it's like one of those things have stuck to the bottom of the foot a device. As it is in the hospital? "Oh, here is his walker, but also have a box of tennis balls to help to light yellow."