It would be my opinion, again just an opinion, that your perspective is based on too narrow of a data set. I.E. the "people you know in the industry" may number in the hundreds.
https://en.wikipedia.org/wiki/Prostitution_in_the_United_States
If you divide $14B by 1 million workers, that is only $14,000 per worker and you know that amount is not divided so evenly. There are a very few making the most of that amount. As such it is fair to assume most workers are not earning a living wage. In addition to that if you looked at the social factors leading towards prostitution I bet you will find most "workers" in the industry are not capable of "taking care of their own taxes" nor filing a harassment / abuse claim with the police.
Now I am not saying this link is the absolute gods truth, but consider it be not far from the truth.
https://www.statisticbrain.com/prostitution-statistics/
Percent of arrests that are female prostitutes 70%
Percent of arrests that are the customer 10%
Murder rate for an American prostitute 180 per 100,000
Average times each year a prostitute has unprotected sex 250
Percent of prostitutes who were abused as children 75%
Average age a female becomes a prostitute 15
Average age of a customer 39.5
Percent who want to quit but can’t due to lack of money 84%
Average price per trick $60
The data suggests, for the most part, it is older men taking advantage of younger women. It also suggests they are in the trade less by free choice and more so by circumstance. Making it legal, without regulations to protect the workers, isn't going to improve the situation for the majority of prostitutes in the USA. I expect the people you "know in the industry" are not reflective of the majority.
Prostitution isn't evil in so far as the act of trading money for sex. Prostitution is evil in that it propagates the abuse and victimization of those least able to protect themselves. I offer to you, that it is irresponsible to champion for decriminalization without the protections that can be offered by regulation. One without the other is equal to the mis-Justice we have today. In my opinion.