Change server profile to stock pictures for free

I have been added to a Discord for work but mostly use Discord for crypto so have a goofy pfp and don’t want to DOX myself globally. It’s crazy to me that I have to pay $10/month just to change my pfp in that one server. I can understand that Discord charges for this feature because they need to store multiple images, although this seems like it could fall under the Nitro Basic subscription. However, free users should definitely have the option to at least change their picture to some selection of stock images.