The key point in what you say huha is ‘as long as they are not hurting others’
The debate in this thread is about whether providing sex (via prostitution) hurts others. The consensus is that it does.
There is demonstrable harm in supporting a practice which relies on trafficked, impoverished or otherwise already harmed women (for the most part) supplying sex. The circumstances which mean they are selling sex constitute coercion.
The SAHM comparison above is a red herring - if a husband said, I will only give you bed and board if you have sex with me or perform sex acts on me, we would recognise this as coercion and abuse. If society fails women to the extent that the only or best means of survival is selling sex (which is not a commodity, they are selling access to their bodies, let’s be clear), then that is coercion and abuse.
The second harm is done to women as a group because prostitution perpetuates the idea that women are sex objects and their human rights are lesser than the man who desires sex. The Ghana example is a red herring because the only reason it is news is because it is so unusual.
The third harm may be done to disabled people by the assumption that this is what they want.
I also would be wary of research which promotes sex surrogacy, it does not mean it is value free and there is no agenda behind it. It still devalues women/female bodies.