Practical purpose of installing 360 antivirus software on computer

Isn't the purpose of installing 360 antivirus software on the computer to protect computer security and kill viruses? But I didn't install 360. My computer uses Tencent Computer Manager, which has comprehensive functions, such as virus killing, computer cleaning, software management, computer diagnosis and so on. All practical functions are related to computer protection and maintenance. There is also a cloud killing library, which can quickly identify various hidden viruses.