My freedom to swing my fist ends where your nose begins, the saying goes.
I don't like to turn on the TV and get porn content, and especially I don't like my children to be exposed to that content. I'm not opposed to porn content to exist, as long as it is somehow ringfenced from the access of minors. A majority of the population in the US agrees with this stance. Putting porn out in the open is like swinging a fist in their nose. It's not freedom, it's aggression.
If this argument feels unconvincing to you, just replace "porn" with "Holocaust denying propaganda", and read it again.
Keep in mind that there is a vast zone between showing a couple holding hand and random people straight out fucking. What's missing on TV and the Internet these days are tasteful and varying depiction of people expressing their love in wholesome ways. People need references as to what is normal and not shameful. Banning _every_ depiction of physical emotional engagement is certainly not the way to go.
Also, there is difference between broadcasting something that leads to huge loss of freedom and life ... vs broadcasting something disgusting.