Kali Linux is not safe to use out-of-the-box as your primary operating system. It can be hardened to be safe to use, but that requires good sysadmin skills. If the person asking this question is a beginner, then they probably should stick with another OS as their primary.

Is Kali Linux worth it?

The fact of the matter is, however, that Kali is a Linux distribution specifically geared towards professional penetration testers and security specialists, and given its unique nature, it is NOT a recommended distribution if you’re unfamiliar with Linux or are looking for a general-purpose Linux desktop distribution …

Is Kali Linux good for everyday use?

No, Kali is a security distribution made for penetration tests. There are other Linux distributions for daily use such as Ubuntu and so on.