Actually, in this case, it's partially the opposite.

The Madison River Telephone Company (later CenturyLink and now Lumen) started blocked calls and services from Vonage (VOIP) in 2005 because VOIP was a threat. The FCC stepped in and ruled against Madison River in what was really the beginning of Net Neutrality legislation.

Their ruling established that phone carriers couldn't discriminate against other services accessing their network and its features. Among those features is Caller ID. Since any. VOIP phone system doesn't actually originate from a telephone exchange, so they all essentially have to "spoof" their Caller ID.

The phone companies can't block CallerID spoofing from spamme4s and scammers without violating a 20yo ruling from the FCC.