Not sure that's really a fair criticism of the latest MacBooks. They have an HDMI port and 3 usb-c/thunderbolt4 ports that all support display port output. The only case you need a dongle for is support multiple displays while using only one port.
The material they are made of is an interesting thing to call out here. Does it offend you that this $2k machine also relies on plastic keys on its keyboard?
these ports should be part of the motherboard
OP's goal was to connect multiple monitors with one cable, so adding more ports would be of little or no use.
He doesn't need a dongle.
You can literally just buy cheap USB-C to DP cables on Amazon that work perfectly fine.