We have unisex bathrooms halls with stalls for anyone in Finland, amongst other gendered and unisex bathroom solutions. I don't recall any report of any issues in those kind of configurations, nor have I witnessed that myself, nor has anyone mentioned to me witnessing, experiencing or causing any issues.
To me this whole "issue" seems to be mostly catastrophization and the little real issue that might exist could be somewhat effectively prevented with smart bathroom infrastructure.
To me this whole "issue" seems to be mostly catastrophization and the little real issue that might exist could be somewhat effectively prevented with smart bathroom infrastructure.