No, making them unigender (with stalls) can be dangerous because rapists. You can make unisex bathrooms if they're the individual kind (the ones that are a single room with a toilet and sink), but those are impractical in places with large traffic flow.
What I don't get is why they're making a fuss at all. Dressing rooms usually have walls all the way down to the floor for precisely this reason, so there's no danger, and if it's a ciswoman or a transwoman sneaking peaks at someone changing, it's because they're perverted assholes, not because they have certain genitalia.