Ah, yeah, Venom is just a suit in the same way that a TARDIS is just a box, heh.
IIRC, isn't it that you don't actually wear a symobiote as much as it kinda completely absorbs you? Sort of like ... After a caterpillar goes inside a cocoon, it ... Dissolves. Into caterpillar goop. And then the goop reforms into a butterfly.
In the limited series from the 90s, Venom: Carnage Unleashed, Venom is thrown in to a train by carnage and merges in to a stripe on the train to hide and escape.
You saw the parts where Venom instantly healed mortal injuries, and where Carnage split his chest open to show off in his introductory scene, right? The host is clay in the symbiote's hands.
I mean Venom is injured all the time in ways that would clearly impact a body within it. So either the host body goes full caterpillar-coccoon and is basically jelly while Venom is fully formed, or the host's body becomes immune to injury/near fully regenerable, in which case Venom could wreck the host's face without worry.