Why are there so many rogue software on Android phones?

There are a lot of rogue software for domestic Android phones, but serious Google will not have them. Rogue software for domestic Android phones can be divided into two categories. One is the software that comes with the system. Some of the software that comes with the system is really useful. , such as: phone calls, text messages, etc. Some are rogue software, such as mobile wallets, smart voice services, videos, music, etc.; the other type are pure rogue software, such as 360 Security Master, Toutiao, etc. In short, the purpose of rogue software is to make money in your pocket. Domestic mobile phone manufacturers want to make money from you, and software development companies also want to make money from you.