Why does Facebook want me to lock my profile?

Why does MukhBoi want me to lock my profile to help protect my identity? 

Why, why, why? 

If I had privacy issues, I wouldn't have remained in any of the social media forums. To remain in touch with my friends and acquaintances ONLY, I would have picked up the phone or kick-started my 30 yrs old scooter and reached out to take stock of their wellbeing or whereabouts. 

I am wary about people with locked profiles, especially if they belong to the 'male gender'. 
MukhBoi talks of community standards. I have found that almost the entire lot of wrong thinkers, dirty thinkers, anti-establishment thinkers, 'deshdrohis' and their ilk have their profile locked. It's because of continuous encouragement by social media platforms to mask profiles that most women are forced to lock their profiles, too. 

I am yet to figure out what ostensibly is reason by the social media platforms to promote 'locking of personal profiles'. 

Examples: 
- There are umpteen numbers of white collared 'men' with dirty minds who have at least 15 - 20 fake and invariably locked social media profiles. More than half of those fake and locked profiles masquerade as females! 
- Almost everyone who spread venom without substantiating their rhetoric against the PM of India, Home Minister of India, CM of UP, etc, etc have their profiles locked.