Your friend just has not found the right gear. You have to pay for it but I ride AGATT 365 days in and around Orlando. Hot in the summer? Yes. Unbearable? No way. Just keep it in the breeze.
ATGATT. 20 degrees to 100 degrees. No worries.
My girls: Isleen - 2014 F6BD Saorla - 1995 FLSTN Heritage Special
"Politeness, n: The most acceptable hypocrisy." Ambrose Bierce