Was Trump Actually Right?

Last week, Trump told Chris Matthews that, if abortion were illegal, women getting abortions should be punished.  There were two paths of thinking this led me down:

1. When should the person purchasing the illegal act/item be punished versus when should it be the provider?  In most cases, I would say it's the provider: drugs, guns, murder.  There are a few where it should be the purchaser instead, the primary one that comes to mind for a potential is prostitution.  There's also the potential for the purchaser and the provider should both be punished.  In the case of abortion, there's an interesting predicament, which leads me to thought-path #2.
2. Why do pro-life people think that abortion should be outlawed.  My understanding is that they feel it's murder.  They feel that personhood begins significantly earlier than I do.  IF you feel that abortion is murder (I do not), why would you not feel that the woman seeking the abortion should be punished?  The pro-life movement seemed to instantly distance itself from Trumps statement and even lash out at him for it, Cruz included.  So, I ask Cruz, if person A brings someone to be murdered by person B, is person A not going to be charged with accessory, at minimum?  So, how is the person within the woman different from the person outside the woman?  I feel it necessary to remind everyone reading this that I do not believe the thing that is growing within a woman is a person, I believe abortion is not murder, and therefore the doctor is not murdering someone and the woman getting the abortion is not an accessory.... but I'm curious what the distinction Cruz makes is.