This is a huge misrepresentation of the issue, as are many of your other points. The increased moisture content of warmer air, at the simplest level, is irrelevant because condensation is a function of relative and not absolute humidity. Secondly, and much more significantly, increased water vapour acts as a powerful feedback that greatly amplifies the forcing of greenhouse gases, accelerating global warming. Thirdly, these effects change global circulation systems, leading to regional climate changes that include both flooding and droughts, as well as long-term regional temperature changes, all of which are much faster than the capability of natural systems to adapt. And fourthly, this destabilization of the climate system also leads to more energetic and destructive storms.
This chart from the IPCC AR4 provides some insight into some of these threats:
I would also add that, although I’m not a moderator and this is not a Politics & Elections forum, nevertheless the denial of climate change or its impacts is generally regarded as typifying the kind of nonsense that is generally discouraged on this board:
Climate Change Denialism. We believe the science. While there is room to debate ways to deal with climate change, the existence of such is an observed fact.
New Rules for Politics and Elections – January 2020