TLDR: New case is causing a gap when laptop is closed, will it destroy my screen in the long term?

I have bought a cheap hard MacBook case there on Amazon a while ago and when on the laptop, there was a gap when it was closed. I sent it back as I wasn’t happy with the gap. Fast forward another couple weeks later and Apple have one on their website by inCase that is sturdier but more expensive. IA product on apples accessories store should be good, right? It arrived today but clipped on, there is still a gap when closed. I understand that there will always be a gap no matter which case I get as its clipping on to the lip of the laptop however I am wondering in the long term, will it not let dust in and destroy my screen over time? I also have it in a laptop sleeve that I keep it in at all times. Would love to hear peoples experiences and opinions on this.