Agreed most people are sexual. Disagree that most people spend most of their time fucking or trying to be fucked. As with everything, it's a scale. That's an extreme end of the scale. If this were true, no one would go to work, visit friends, go to the movies etc. They would spend their entire lives trying to and getting laid. I'd argue most are in the middle somewhere. If you're not asexual or demisexual, sex is great but most aren't going to go out of their way to find it if it's going to disrupt the rest of their life.
Also, the media has the position that people are out all the time getting sex. The reality is the younger generation is having less sex than their parents. Single people also, by research, have less sex than those in a relationship. Makes sense. Most single people aren't big on having constant one night stands.