People tend to limit their usage when it's time-billed. You need some sort of desktop computer anyway, so, if you spend the 3K this one costs, you have unlimited time of Nvidia cloud software. When you need to run on bigger metal, then you pay $2/hour.
Yes. Most people make do with a generic desktop and an Nvidia GPU. What makes this machine attractive is the beefy GPU and the full Nvidia support for the whole AI stack.