I'm not saying the telescope is real, but radio signals can be transmitted at high power through a highly focused emitter, and received by similar high gain radio telescopes. What's harder to believe is them still receiving signals from voyager who's signal is like a billionth of a billionth of a watt (or whatever they say it is) by the time it reaches earth. I guess in theory they could have sent a command to reprogram voyager to send a signal very slowly, so they can better amplify the signal similar to long exposure night sky imaging.
Sure, you can send a "radio" signal, but you absolutely cannot send a concentrated signal capable of decent bandwidth that would permit the transmission of a high definition photos over those distances. I defy anyone to send a MB of data across a radio signal.
If you could transmit high bandwidth across radio signals, they would have done it already on earth, allowing internet access around the world through radio signals.
Closest they have come is a microwave beam across the Mediterranean, but type of beam that would allow high bandwidth would be a very narrow and targeted beam that has to be line of sight and precisely aimed. You'd have to hit the target spot on, and the amount of power required to generate such a beam is extremely high.
https://www.globenewswire.com/news-release/2016/02/08/965626/0/en/Exalt-Sets-New-World-Record-for-Microwave-Link-Distance.htmlThis explains how microwave broadband needs to be line of sight ...
https://waveinternet.co.uk/line-of-sight-broadband/Yet Exalt Wireless was able to send a signal across the Mediterranean over 235 kilometer, which is simply not possible if the earth were a globe. This is actually an extremely compelling argument for Flat Earth, by the way.
But to send a narrow band beam like a microwave, it would have to be targeted and precisely aimed, and the though of a satellite beaming such a signal a million miles and then hitting precisely a receiver somewhere on the earth, when the earth is rotating at up to 1000MPH and Webb is allegedly moving at 720MPH ... it's laughable. At best you might be able to hit the earth somehow, but to have a scattered signal that could be picked up anywhere on earth and yet be concentrated enough to transmit high-definition images ... that's absolutely impossible.
Oh, and another compelling argument for flat earth is the Knickebein system invented and used by the nαzιs during WW2 --