Downloading software is not piracy. Using it is. After all you are entitled to personal backup of your install media. The fact that the backup is distributed and cloud based is irrelevant.
There is another reason why downloading software from "somewhere else" is less than ideal in a case like this. The reason is that the pirated download might not be the original software as provided by the developer; there is no guarantee that it doesn't have, for example, some virus in it.
There's no guarantee the original software doesn't either...
And if it's precracked/modded/etc. then it's definitely not the original, but those who are downloading those would consider the modifications to be value-added.
Nice FUD. But one could just scan it with an up-to-date antivirus to be sure. Unless it is some form of government funded virus it will most probably get detected.
I have yet to encounter a hard to detect and remove virus coming from a downloaded software from "somewhere else", I'd rather install software coming from the scene than a download portal such as softonic.