Trump, Mnuchin, Pelosi, McConnell, Sanders, and Biden have all referred to this as a stimulus. Sure, anything with money could stimulate some, but the express purpose of this was to stabilize and stimulate the economy. Most bills have that a secondary goal. A bill which directs money to institutions that do cancer research stimulates economic movement but that is not comparable to giving money directly to people for not working or losing their job.
There is no mention of the bill, either in the law itself or in discussions, that this would somehow reduce transmission by encouraging people to stay home.