Folks aren’t just misinformed, they lack an even basic understanding of how telecommunications works.
Your iPhone has a radio/modem that’s a chip inside your iPhone. It receives specific channels or wavelengths. This is just like the FM radio in your car.
The Federal Communications Commission regulates what providers get which channels. The telecoms actually bid billions on specific channels and thereby have specific rights to those channels or frequencies (wavelengths). T-Mobile has the exclusive rights to the 1900 MHz frequencies. The FCC HAS granted Space X (Starlink) to use that band for direct to cellular service.
The 1900 MHz frequencies and the specific channel on the radio/modem on your iPhone is referred to as n51 as I recall. All cellular radios are capable of receiving that channel. Just like your car FM radio can receive all the FM channels.
If you or I don’t want to listen to conservative talk radio, then we won’t tune our radios to those stations. If you don’t want Starlink, don’t subscribe to T-Mobile.