Extension will only prolong the pain. There was a two year interval from triggering Article 50 till leaving, but now here we are seven months remaining and people crying that there's not enough time left to prepare.
No one is prepared because, until a few weeks ago, we were being told that there would be some sort of great deal. Until the companies knew exactly what that "great deal" was going to be they had nothing to prepare for.
Now, of course, that we are being told that a "no deal" is becoming likely, they have something to prepare for, and are justifiably concerned of the chaos that will happen as there are precious few months left to prepare for something we were told was not going to happen.
In other words, you are once again posting simplistic bollocks.