All legal issues are philosophical. There is a philosophy at the basis of every legal system.
But not all philosophical issues are legal issues. That's the point. Courts can only rule on issues that the Constitution grants them authority to rule on, and that certainly is not the power to determine that individual human cells have thoughts, feelings, and experiences.
It's when those philosophies come into contrast and argument that these issues arise.
The philosophical issue here is 'What is life and what does it mean to be alive?'
Absolutely not. That is a question that philosophers, not judges, are equipped to debate. Judges can only decide on whether the law grants an embryo a civil right. The Alabama Supreme Court has now declared that it does, but there are strong questions about whether the federal Constitution grants state legislatures the power to grant a brainless cell or cluster of cells a legal right. The Alabama decision appears to grant them all the civil rights that babies acquire at birth, but not before.
There's no one answer to that on which our society has agreed, hence the debates.
The legal issues may be complicated, but our society has agreed that courts are limited in their power to resolve philosophical debates. They have to have a legal basis to do so. That is actually what the debate is over--whether they have the power to grant an embryo full civil rights.
As far as I am concerned, a rock is alive in some measure.
Well, you certainly take a broad perspective on the nature of life. I wouldn't try to back this claim up in court, if I were you. Would you consider it murder to smash a rock? I would like to see a lawyer defend the injuries suffered by a pile of pebbles.