So, what are the opinions of this war?

I have a few questions:
1. What is it about? Drugs, Money, Land or Power?
>Drugs: Is this the escalation of some kind of drug ring
>Money: Is this in response to the financial lul caused by corona?
>Land: Is this just a simple land grab?
>Power: Is this just a ploy to get Ukraine into NATO? Is Putin being a megalomaniac?

2. Why aren't they nuking Ukraine into oblivion? My opinion: if nukes aren't used, this is a "war" has been planned as an economic recovery policy to distract from the covid issue; if leaders aren't assassinated or nukes aren't dropped, there's something fishy going on.