I personally really like the idea of what Framework is doing and wish more laptops followed suit, but that is a trivially solved problem you identified:
https://www.amazon.com/UGREEN-Connector-Extender-Chromecast-...
But again, the "dongle" argument is moot and not really a reason to either consider or avoid the Framework, for me at least. It's more about the device being open and repairable, and arguments about dongles are just attempts to justify one's current USB-C only device.
Agree completely. For me, Apple's USB-C only ports isn't an issue as everything I use plugs in via one or two TB3 cables (depending on personal vs work laptop) and daisy chains from the monitor or a TB3 dock so no dongles needed at all, but I still appreciate the design choice Framework made and think it's a good strategy.