The gemara actually directly permits the consumption of gebrokts.
It explicitly says that once matza is baked, it cannot become chametz (Pesahim 39b).
The same daf also says that the preferred species to use for marror is chazeret, aka romaine lettuce.
It has nothing to do with science. It has to do with being logical and intelligent and not wanting to be more frum than the Talmud.
Ironically, I know a lot of Hasidim who don’t eat gebrokts, and also clap on Shabbat, carry on Shabbat, make kiddush on schnapps, and do many things against the halakha peshuta.