>

They could also use them in stores to reach those high shelves.  Multipurpose Tall folk.
Okay then we’ll get wet for your convenience >

Just dodge from tall person to tall person. Problem solved. 
/a >

Exactly how high are you that you sat and logically made this argument 🤣 >

if I had to guess, above 5'6 >

You’re right, this is totally unfair. What should happen instead is every short person should be gifted a taller person as a useful buddy. The useful buddy will hold the umbrella for the shorter person and do everything the short person wishes. Great idea OP