All of that can also be said about resin holes, plus even if you survive a facehugger trap without an alien finishing you off you still have to go get surgery, plus there's nothing that stops you from hiding resin holes under other sprites unlike claymores so you actually have to right click every single tile instead of just paying really close attention, plus xenos can make more resin holes than marines can plant claymores since they make them with infinitely regenerating plasma instead of having to get them from cargo.
If there's a good carrier on the alien team, especially on prison station, being in medbay is a pain as doctors have to keep removing larva and any marine who comes up with non-life threatening injuries has to wait for 20 minutes for some broken bones that take 2 minutes to fix while doctors deal with a constant stream of infected marines, and the doctors having any time to vend squad medics something from the MarineMed or anything similar is right out.