To insist that those who believe that abortion should be legal when the mother is in danger should vote yes in this poll is an appeal to extremes fallacy. As when one is talking about abortion they are talking about abortion in general and not exhaustively.
For example, one can still support the criminalisation of murder even if they accept that there are some exceptions where murder is justified.
Supporting legalisation *to some degree* is not equivalent to supporting legalisation *in general*, which is what this poll is about by default considering you did not specify specific situations of abortion.
I refer you back to my example, which demonstrates the flaw in your logic :)
In that case, I apologise.
But if a 'no' vote is equivalent to a categorical denial of abortion with no exceptions then this poll becomes, to some extent, a non-entity. This is because the vast majority of pro-lifers would permit abortion in cases of the mother's life.
Ultimately, it does an injustice to pro-life people because they would be voting 'yes' to this poll, which makes them look like they are pro-abortion even when this couldn't be further from the truth.