Rather than invoking "hate speech is not free speech" which might look like someone devaluing free speech, it might be better to turn it around.

For instance, you had those "free speech" social networks which said they were all about free speech, but then went full puritan.

Sexual expression is nonetheless a very important form of expression. It is an integral part of someone. It is important for someone's livelihood. It is important economically. It is said to spur innovation. It is a form of entertainment.