Are you afraid of kangaroos

Hello, I have a friend from Western australia who told me she saw a huge kangaroo while she was walking outside. iirc she believed that the kangaroo was a mother kangaroo with its joey/baby nearby. At this point she said she ran away because she was afraid of getting attacked.

Now we're debating whether it's normal to be afraid of kangaroos in the wild and my argument is that its not (I don't have a strong argument im not australian) however I've seen videos of kangaroos in the wild and they seem relatively harmless and friendly

Can someone clue me in on this im confused as to whether her actions made any sense or if kangaroos are actually aggressive to humans in the outback of australia