Blowouts are dangerous and should be avoided where possible. Don't mock or undermine this person's fear of them, it's a perfectly rational thing to want to avoid. They may sometimes be over exaggerated, but that doesn't make them safe.
Your annecdotal evidence of them not being "thaaaaat bad" doesn't really add much to this discussion, and your suggestion that the fact that artificially created blowouts on YouTube exist means that they aren't very dangerous is, IMO, laughable. There are hundreds of controlled demonstrations of chip-pan fires on YouTube... that doesn't imply in any way that chip-pan fire "in the wild" are not dangerous.
Blowouts are only specifically called out as being dangerous because they tend to happen without highly obvious warning, require the user to take action to prevent them from causing other problems, and happen at highway speed.
Any situation that happens rarely and requires the average Joe to take action is going to be "dangerous" at scale because some people are inevitably gonna panic and screw it up.
Blowouts are something people feel they are not in control of so they fear it more than they should.
