not true, if you have physical access to it, and you do, then there is always a way to get the password to mostly anything.
You mean resetting it?
I hope you know that really does reset everything, straight down to the DNS and everything. So unless you know what your doing and you wrote all that stuff down, go ahead and reset it to remove the password, but I strongly discourage that.
Again, if the default password isn't working, then either your ISP (i.e. the company that you get your internet from, like Comcast or Verizon.) or your parents set it.