Framework lets you buy bare mainboards, if you can't run those on your table without the radio police swatting your house then they wouldn't be allowed to sell them anyway.
There’s more to it than that. It’s better for the longevity of the components to be shielded, and the noise it gives iff could bother you in your home, in terms of wifi, Bluetooth, etc interference. I practice electric guitar at home and I don’t want an unshielded computer near me when I’m doing that.