The base model 13 inch MacBook Pro doesn't actually need 16GB of RAM. My 2017 13 inch MacBook Pro, with 8GB RAM, is still chugging along just fine. And I edit videos on that laptop.. with 8GB RAM and no dropped frames. I do web surfing, with multiple tabs open, on that laptop.. with 8GB RAM. I typically have a dozen apps open simultaneously and I don't seem to have any problems.. with 8GB RAM. macOS is based on BSD, and BSD uses as much RAM as it can get its hands on whether it needs it or not (unused RAM is wasted RAM).
Now, other people are going to fabricate excuses to justify the need for 16GB RAM on the base 13 inch MacBook Pro, but that doesn't mean the machine actually needs it. If you actually need 16GB RAM, then do a special order. But I don't think it's fair to increase the machine price for everyone (and you know Apple will if they make the base system 16GB RAM) who doesn't really need that much RAM.