I honestly agree with your statement. If your goal was to just have sex, I believe you'd be far better off just paying for it instead of using nightlife as a means to acquire this. You have to literally go OUT of your way to show up to the nightlife venue, pay cover charge, drinks/food, etc. Then you have to actually approach women, which does not necessarily result in success. There is a lot of time, energy and money going into something that has no guarantee you will achieve what it is you desire. Nightlife is not the best means of meeting women and overall has a low success rate for men. You also should consider that you probably would have to lower your standards by quite a bit if you were looking for something like that, which may or may not be something you would be open to.
Age is also a big factor here as well. A guy that is in his early to mid 20s could realistically meet women in this environment, especially if he was in a college town. If you are into your 30s, or even approaching 40 or past this, you are probably wasting your time in my honest opinion. Most women have usually moved past the "going out" phase by the time they reach their late twenties, so they'll mostly be between 21-25. This is something that should be seriously considered in my honest opinion.
However, here is my take on hiring a "professional". Having sex with an escort, or whatever you want to call her, is not at all the same as with a woman that truly wants to have sex with you. It's better than masturbation for sure but not comparable to something more natural, I don't really know how to explain it. There are some instances where the escorts get into this because they are legitimate nymphos, these would be the best ones to find. However, this is not the case for many of them, so keep that in mind. There is an element with many escorts that personally gives me a very uneasy feeling. Many of these women have drug issues and use escort services as a means to fund this issue. You also should consider that there is an underworld element to these women, which can potentially come with a host of many other issues. In addition to this, there is the possibility of getting into legal trouble as well. I personally believe that there is nothing wrong with a man hiring for services like this but there are many other factors that should be seriously considered.