Radio waves, Light we see, ultraviolet, Xrays are all the same thing. We can see light, Xraay machines can see and record x-rays, but instruments on earth can also see the special Radio wave light beacon on the spacecraft from very far away. It's hard to block and doesn't take a lot of energy to transmit compared to a lot of other special types of lights. The light blinks on and off very rapidly. The antannae on earth see it and convert the ons and offs into 1s and 0s. DATA!

'Insist' seems to be the key word there. If it were 'suggest', at least it leaves further communication as an option. Insistence is for cases like 'my friend came to me injured. I insisted they see a doctor.' There's only one good option. The friend might not be in the right mental state to plan the right thing, they came to you, not a doctor after all.

'Insist' is a one way street. 'Suggest' or 'discuss' or 'problem-solve' are two way streets. They're social streets that strengthen bonds.

That being said, how you approach someone when you 'share something difficult' can also be closed or open. It takes two to tango.