Entirely possible that while it’s involved in angiogenesis, it’s not a critical component of that process, and angiogenesis can continue just fine without it.
The statement “not important for normal cells” doesn’t mean it serves zero purpose outside of cancer, all it means is that it’s not critical for body functions.
The statement “not important for normal cells” doesn’t mean it serves zero purpose outside of cancer, all it means is that it’s not critical for body functions.