It's hard for me to agree with all of what you say because I consistently see LE go after the low hanging fruit (sex workers) to generate revenue. LE does this because it is usually more profitable to go after low hanging fruit rather than to administer justice or stem the tide of sex trafficking which may also reduce the revenue stream of some governmental entities. Sexually oriented businesses inclusive of sex trafficking are profitable in part because they are prohibited or illegal as well as in societal demand.
Based on my observations these FOSTA laws rarely target the sexually oriented businesses that constitute the global infrastructure of sex trafficking. However, in the future, foreign aid and trade agreements may address this as well and making multinational sexually oriented businesses and sex workers based in the US and around the globe even more vulunerable. I suggest that sexual slavery, sex traffickers and ilicit sex workers will flourish when and where it is convenient for these entities to operate without exceeding their appetite for risk even if it is on the dark side of the web.
As digital literacy of sexually oriented business owners and calculating power of computing platforms increase and the cost of automation and encryption decreases it is a reasonable expectation that some entities may already proffer sexually oriented businesses on the dark side of the web. I hypothesize the dark side of the web is where the recent outbreak of FOSTA laws are herding the most vulunerable sex workers and digitally illiterate sexual entrepreneurs for harvesting....literally.