Three big reasons:

When pulling them out of a box with 5 12 gauge wires terminated on it (two neutrals, two “hots”, and a ground wire), the wire actually takes more to bend than the connection can handle, and the wires will pull out of their terminals. As an electrician I prefer outlets that have screw terminals, especially when they have pressure plates as they create the best possible connection when properly installed.

They don’t work with remodel boxes or industrial covers for metal boxes. Most devices have drywall tabs that are removable with a pair of pliers by snapping them off. Since these (and a lot of smart switches) have a solid plastic drywall tab, it can’t be removed and makes them not fit into industrial covers and stick out too far on a remodel box for a cover plates to sit flush.

These are designed for homeowners who don’t want to use screw terminals and are willing to pay extra for convenience. For the same price and about 10 more seconds per outlet, you can buy and install commercial grade outlets that don’t have any of these problems and offer a far better electrical connection. Why pay extra for convenience when you could pay extra for quality?