I’m seeing the 6pm showing of Sound of Freedom in a rinky dink town (pop 31,000), and my wife and I got the last 2 tickets. On a Wednesday.
A friend went yesterday and it was also sold out.
Edit: no shenanigans observed. Theatre was comfortable, no fire alarms, no issues at all.
honestly, it's not that bad or hard to watch in the way you're imagining. You will cry but you won't see anything too disturbing, it's all implied. You owe it yourself to be brave and go