Sure as hell does. E2EE isn't the only factor you should take into the matter if you care about your privacy. Who knows, maybe WhatsApp stores plain text in the drive. Maybe they send the private keys of the WhatsApp user to Meta. You don't know since everything related to WhatsApp is closed-source. What about the metadata WhatsApp collects? Metadata is a much more valuable thing than you might think it is. Signal proved to collect as little metadata as possible with the response they gave to this subpoena. On top of that, Signal is FOSS. If you had the choice to use one, choosing WhatsApp over Signal would be retarded. Plus you might as well use the messaging app from the original creators of the Signal protocol that WhatsApp came to implement.

And also, if using both of them didn't matter, care to give an explanation about why even Mark Zuckerberg, the owner of WhatsApp, decided to use Signal instead?