It may not be meaningless per se, but it isn't sufficiently precise. It isn't rigorous enough.
Lots of things are "human life" -- tissue samples, cancerous tumors, cell cultures. None of those things are persons, however. They do not enjoy the protections that persons do. So, while calling an embryo "human life" may be stating the obvious, it is not tantamount to establishing its personhood, so it is not enough to establish that it has the rights that persons do.
Despite even that, however, no person, born or unborn, as it were, has an unqualified right to occupy the body of another person without that person's consent, nor does any person enjoy an unqualified right to forcibly respirate and extract nutrients from another person's bloodstream, nor to inject another person with hormones and waste. To disallow women to terminate their pregnancies is to endow zygotes, embryos and fetuses with rights that no other class of person enjoys. This is a plain violation of equal protection, and precisely why no abortion ban will withstand tests of Constitutionality.
Of course, The promise of a ban on abortion is incredibly more valuable to conservative politicians than the actual achievement of one, so the right-wing politicians will keep dangling this carrot in front of you to keep you voting against your own interests, and you're not smart enough to realize it. Congrats.