Your statement is a general one: “clouds are bad”. You do not specify in any way under what conditions the clouds are bad on your system. To prove such a generalized statement wrong, it is sufficient to find only one example where it does not hold true. The conditions are irrelevant, as they were irrelevant in your original statement.
Nevertheless, this is live weather right now over Zürich, I can actually see the clouds moving, as the wind is pretty strong, just like IRL right now:
