I will not join you in that.
There are a few reasons.
Firstly, there is good reason for gaps under toilet doors. They have in the past been useful for saving lives for those who have collapsed on the toilet floor. I think there is a Chesterton's fence situation in removing gaps.
Secondly, female toilet usage will at times require the use of the public space around the basin and hand drier. Sure this can be done in a cubicle, but drying out spills and stains will mean that a cubicle is out of use for quite some time.
Thirdly, unisex toilets and changing rooms are reported to be more dangerous. There have been posters who have come to MN tell us how they were pushed into a unisex toilet by a male and attacked. Because people's awareness of what is happening in the cubicle is very low and if there is a gap where a female person and a male person are the only two people in that space in front of a toilet, who is going to be aware that a male person has pushed a female person in and locked the door.
Fourthly, we know from the reports from female school students that they will dehydrate themselves so they do not have to use unisex toilets. And I can certainly understand. They are uncomfortable using a toilet where taking out and unwrapping sanitary products or just toilet sounds can be heard by someone from the opposite sex. And we have seen male people with transgender identities mocking women in general about their toilet sounds. It is great amusement to them to hear women going to the toilet. I have experienced mocking about toilet noises before myself from male people.
But the great thing for you is that there should be a range of toilet provisions where possible. So you will have a choice. And I will stick to the female single sex spaces where they are available.