You have top secret clearance and know every detail of the program to ensure it doesn't violate the Fourth Amendment? Because some version of this has always existed makes it a-ok legit?
Just because the government says something is legal doesn't mean it is legal or ethical and shouldn't be questioned. Please see historical precedent: US revolution from Great Britain, the end of slavery, the end of Jim Crow laws, the end of prohibition, the legalization of abortion, etc. Having other problems that need to be addressed does not negate the fact that this program also needs to be addressed.