Nobody is born as a scholar.
Yes, they provide higher security. Encrypting your paper wallet is better so the private key isn't leaked at a glance.
Your computer/mobile can be affected via viruses/malwares/keyloggers. So if you are connected to internet and your computer is affected with Bitcoin related malwares, there is a high chance you loosing your Bitcoin. Using a paper wallet or offline computer/phone, your private keys aren't exposed to internet but can be stolen by a person who have access to.
-MZ