I am fucking sick and fucking tired of people interfering with the free choice of individuals in any effort to "fix" society and "help" people. Lawmakers and advocates, have some epistemic humility and acknowledge that your own perspective may be mistaken. Not everything is oppression. Not every activity is injustice. Sometimes, people just fucking disagree.
The goal of the legislation in question is specifically to help individuals that have been coerced, against their free will, into sex trafficking. It is not about voluntary interactions between consenting adults. The legislation might be misguided or ineffective--I haven't really looked into it--but it very definitely isn't about restricting the free choice of individuals.
The key is in the definition of coercion. Was violence threatened? Is a person physically restrained? If so, that's coercion. When the law starts to deal with "psychological coercion" it denies agency to adults.