It's much cheaper and easier to purchase insurance against the costs of an attack or breach
...right, which'll result in an Insurance Institute for Cyber Security (ugh) which'll mandate certain precautions in order to reduce losses. Insurance will be the driving factor in determining which controls work, and any CISO would be an idiot to buy insurance and not implement the controls the insurers want.
Please show me an example of competition in the cloud with a Windows OS?
Sure. Here's a good reference from the Linux Foundation showing the continuing improvement of Linux's foothold in the context of cloud applications. 75% Linux (all flavors), 23% Windows (all flavors), etc.
but considering that the 75% figure is made of all Linux distributions, the breakdown is likely split between CentOS, Ubuntu, Fedora, Debian, et cetera. Everyone's in the double-digits. I'd call that comparable, potentially "even," and I'd certainly call that greater than your "zero presence" figure.
I'd attack your character much the way you attacked mine with "What century are you in?", but it's easier to just use facts.
I bet the human brain is a kludge. -- Marvin Minsky