So why do the phone companies allow the number to be spoofed? Now I have not worked on phone related software for twenty odd years but back in the nineties we u

So why do the phone companies allow the number to be spoofed? Now I have not worked on phone related software for twenty odd years but back in the nineties we used ANI data provided by the phone companies to track where employees logged into work from. Being part of a guard services company with operations nationwide it was the easiest and best solution we found. Guards would call in from a phone at the location being served, enter their employee number or SSN#, and log in to out of work. It served the purpose of us knowing they were on site and enforced the requirement that guards had access to land lines at all sites increasing their safety. So am I to understand that the phone services don't see the spoof attempt? I know its a separate information that is passed along but the number should be sacrosanct and if not from a physical location that the phone company can verify should be represented as such on the end call. The name and text I know isn't simple to deal with but none of the robo calls I am getting provide it. I have found that waiting for the real person to pick up and asking for company name so I can report them does tend to cause the calls to drop off for awhile. Still I would prefer them to not be on my cell. they certainly do not respect any do not call list.