By modern values, yes those are reasons to allow abortions.
But modern values devalue life in part because they also devalue sex. They treat sex casually, as though it isn't the outward symbol and seal of a lifelong commitment and promise, and the very means by which more human life is created.
There would be no felt need for abortion to exist if sex and human life were both valued as they ought to be - as sacred, as gifts with a particular design not our own, as capable of great glory when used rightly -- and great devastation when used wrongly.
Consider how delicately and carefully we handle matters when the stakes are high - when there's the possibility of gaining or losing much based on our decisions. Sex and marriage and family ought to be held in high regard, because the stakes are so high. They can end so well -- or incredibly badly when handled outside their designed operating parameters.
Abortion to me represents the human collateral and fallout from having abandoned a right view of sex and marriage and family. So much death. Ideas have consequences, indeed.
As a side note, a high view of sex and life also increases the travesty that rape is. It's so much worse, morally speaking, than liberals can say it is given their moral framework.