Most of the actresses claim that they were training to become doctors or lawyers of IAS but one day some director or producer saw her in a cofee shop and approached her to play the lead role in their film and she became an accidental actress.
All such stories are utter nonsense. Actresses grind for years to get work especially if you don't have contacts (many time with contacts and generous help from certain people in the industry even non actors get through movies while the actual talent keep waiting). And when they become stars they do two things- invent such stories which makes them feel humble, down to earth and wholesome personality with a story that could be sold to people.
The second thing they do is change their birth date in public platforms. And not just the new ones, the likes of Sridevi, Jayaprada, Mandakini, Aditi Rao Haideri all had different dates of birth when they entered the industry and suddenly they became younger with age. And the biggest culprit here was Mallika Sherawat who has a fake name, age and identity. She was an air hostess as early as 1992 at the age of 18 which meant he was way above 30 when she became a star with murder. But she was constantly in denial about his divorcee status, the allegations of her family about her and her age.
Also actresses tend to hide their Bollywood connections. So Kiara Advani won't tell you about her connections with the families of Saeed Jaffery and Ashok Kumar, Ameesha Patel portrayed herself as an outsider while hiding her family connections with Rakesh Roshan's family. Amrita Singh’s mother used her political contacts to get her through films, etc.
In many families of these actresses the whole family depends on the income of the heroine. So Jayaprada’s secretary used to be her brother who conducted the theatres owned by her in her name, Aishwarya Rao's family used her money and connections to produce a film Dil ka Rishta which failed badly, Hema Malini’s mother used to handle her finances for a very long time and even used it to produce films like Swami. Nutan in the 1960s actually filed a case against her mother Shobhna Samarth for mismanagement of her money.