Here's why. List the topics. It starts with who invented the radio. It goes on to tell what the use of the radio was during WWII. Then it switches to automobile radios and from there to cell phones (a life altering invention) and their dangers while driving.
I don't see the connection, but we are now watching television which jumps to talking to each other and then back to TV and the series you can find on TV.
There is about 10 subject switches in that one paragraph. Normally that would not even be passible writing, let along good writing.
