What is your opinion on this scenario (details inside)?

A girl has some “private” problem and doesn’t feel like sharing it with her friends, no matter how hard the friends try to persuade her. One day, quite by chance, her friends come across her diary. They decide to read it, and find out what the problem is. They successfully help her. But when she find that her friends know the problem through the diary, she gets angry and blame the friends, saying that they “don’t respect her privacy”. The friends argue that the problem is solved because they read the diary and know what it is, since she didn’t tell them.

What do you think about the scenario? Who do you agree with, the girl or her friends?