I am new and have never had a chick drown (yet), but I also used dry incubation.
There is a TON of information on multiple, MULTIPLE threads, here at BYC, if you use "search" plus "humidity" I bet you wil get, say, 8 zillion results (but no clear, definitive answer
)... A LOT of people posting on those threads name their numbers, and talk about their results, VERY MUCH including chicks that have drowned in the egg!!!
I am far from a guru that is for sure. But I have read a lot and hatched some. I think the answer is unknown. There has been a lot of information on here about chics drowning at high humidity, and others claim great success at the same humidity that other fear they drown them. I have had better luck at lower humidity with a little more air flow. I beleive that the science of in home hatching is relatively un explored and most use what has worked for them in the past.