Why don't android phones come with an installed app locker?

[AC Question]

Each phone manufacturer has a stock file Explorer and Web browser installed. Why don't they have a stock app locker as well?

 

[B. Diddy]

Welcome to Android Central! There are plenty of 3rd party app lockers you can install from the Google Play Store. If it came preinstalled, it would be just another piece of bloatware to the majority of users.

 

[ManiacJoe]

For most users, the security lock screen serves all the privacy needs.

Do more people than just you know the security code to your phone?