Based on everything I'm reading in IP Law and contract law texts online, that is not the case. Here's one from Cornell Law School that specifically says that "Regardless of whether the parties call their transaction a license, sale, lease, or something else, the Principles would apply", where said "Principles" are those of software contract law. And then they discuss how they fall under contract law.
https://scholarship.law.cornell.edu/cgi/viewcontent.cgi?arti...
Here's another from UChicago Law that takes it for granted that the legal reader understands that licenses are legal contracts, since it's full of quotes like "all licenses are vulnerable to the usual attacks that can be leveled against all types of contracts".
https://chicagounbound.uchicago.edu/cgi/viewcontent.cgi?arti...