Life bites you every now and then doesn’t it. Stuff happens, don’t beat yourself up over it.
Life is full of risks. It is possible you could shrink-wrap a chick by opening the bator after it has zipped. It does happen but the reality is that it is pretty rare. I’ve done it myself, shrink-wrapped one. But there are people on here that open the incubator all the time during hatch. Most of the time it’s not a problem but I can think of one person on the forum that does that all the time who is also an expert on helping chicks having trouble hatching. If you run into problems send @amylynn2374 a private message. She is a very nice lady and if she is available is very good about helping.
One problem with leaving the turner in there is that the chicks make a mess when they hatch. It’s a lot easier to clean the turner if you take it out before hatch. But that’s mostly a convenience. The risk in leaving the turner in (even turned off) is that most have sharp corners where a chick can trap a leg, wing, or neck. This can be bad. While I don’t open the incubator during hatch unless I have what I consider a good reason, I’d have done exactly what you did.