As said above, but before you put the active fob into a zippered inner pocket, put it in a sealed zip-lock bag.
That way if you forget it's there and wash your jacket then the fob will survive the experience.
Keep the passive fob somewhere safe as your emergency backup.
If you need a cheap spare passive, contact Ed Ramberger on COG or one of the C14 Facebook groups.
I have never understood why people find KIPASS scary. The technology is identical to the remote SmartKey on my 2004 Lexus and many many other cars since.
My fob has lived in my jacket for 15 years and I only get it out when the battery needs replacing. Misplacing a jacket is a lot harder than misplacing a fob or a key.
I have a copy of the physical key on my keyring (along with trunk key, lock keys, and my C10/garage/house keys) but I use the stove-knob key for opening the gas tank and keep my gas cap lock well lubricated.
As for the theft issue, most places outside the USA that have far higher motorcycle theft figures. Here in the UK we had 40,000 motorcycle thefts in 2020 and in the same year the USA had 53,000, so we have 4 times as many motorcycle thefts per head of population than you guys, and France & Italy have worse figures than we do (6 times worse than USA). Kawasaki make bikes for the world, not just for the USA.
If you leave the fob close to or on the bike, it will keep communicating with the bike and that will flatten the fob battery PDQ. It also drains the bike battery more quickly.
Finally, since I got my C14 I have never dropped the key into the black-hole that is the fairing.