Re: Why is wind a problem
1. Considering ground level wind was mentioned, this is probably what was up.
As for the thing being 21 tons, fair enough, but that doesn't make it hard to move. I have moved 10 ton boats on my own and I am not a strong guy. In water or air, you don't get the friction with the ground and things are very different from what intuition might tell you.
The basic question is, can the wind move the rocket sideways by the couple of meters clearance it has from the tower before the tail of the rocket clears the top of the tower?
Alternatively, can it topple the rocket before it clears the top of the tower? (Once you're clear, you can lean into the wind; while you still next to the tower, you're pretty much restricted to engine gimballing.)
Neither of these would take hurricanes. Just a good solid breeze against that huge sail, err, rocket.
Consider that a 40 knot crosswind is reason not to land most aircraft and those things are more controllable than rockets.