Both of these are based in fact, but not 100% true.
The rockets positions do not depend on which platforms are up, it's unlikely you'll get hit
There is indeed enough time to react, think of it like a expert mode. I've made it through, so can you.
It is NOT "Unlikely" that you will get hit. I've gotten hit literally every single time. Almost half of them go away when all of the platforms are up in general. That's basically like a 50% chance.
I guess the second one is more opinion based, but still. It's annoying when the person up there is just spam clicking for lolz..
Edit: I changed my mind, there really isn't enough time to react :\ The text message literally comes up before the platforms respond. That means a second of your time is totally wasted. If it came up right when the platforms came up, I would understand that as just being difficult, but if it comes up BEFORE they respawn, that is just kinda ridiculous.