Granted, but as a sibling states, the other factor is firmware complexity. I can theoretically drive a high-resolution display on an 8-bit micro (although it may require with some clever bit banging to get I2C to work at all) but its trivial with a 7-segment display.
And as a bonus, you don't have to involve anymore UI/UX design than to answer the question "what number should go here?"
It'll be microcontroller equivalent of running full GNU/Linux to control an Internet of e-waste tea kettle, but CH32V003 + SSD1306 OLED + passives takes less than 10 parts total, no crystals needed, has plenty sample codes online, and costs ~$2 combined. Depending on the price of the final product, it could make financial or product design sense.
In a medical or aerospace application, that added firmware complexity could be a non-starter. Not from a price, or even e-waste standpoint. Its that proving the thing is safe is a lot harder when its complex. That's the real point of keeping it dumb.
And as a bonus, you don't have to involve anymore UI/UX design than to answer the question "what number should go here?"