Sexual abuse and bullying will be a problem regardless of whether the child is walking home, or being ferried around. It should be dealt with as its own issue regardless of how the child is getting home.
Again your failure to read my previous post has led to you spectacularly missing the point that I was sexually assaulted because I was making my way home alone aged nine.
And then had to let myself in.
And process that all alone. Because I didn't know what exactly had just happened to me.
And coming home every single day, after being bullied every single day, to no one at all does have an impact. For a start, by the time my parents had got home, school was shut so there was no teacher to speak to. There was no hug or shoulder to cry on. I did consider ending my own life, as the bullies suggested and would have had the means and time alone to do it.
It was completely negligent to leave a nine year old alone repeatedly after school to deal with that. It's not a separate issue and it's not an isolated issue. The child learns to shut down and that they aren't important enough to have an adult look out for them properly.
But...yeah...the only thing children have to worry about is fractions, eh?