Most people who exercise a profession do so after years of schooling or specialization through working. While these experiences aren't a perfect measure of competence, they ensure a minimum level of expertise that couldn't have been obtained otherwise.

Dating coaches, on the other hand, don't need any kind of credential to exercise their profession. Anybody who understands marketing, has some life experience and has access to internet can declare himself a dating expert. This is not to say that some coaches might be helpful and knowledgeable, but the complete lack of standards in this industry makes it hard to set the good apples apart.

Furthermore, dating advice is a post experience good. This means that its true value is unknown until long after the service is used, and even after that, one might not know the true benefits and costs of the advice.

If you don't reach your goal, you won't know if you followed the advice correctly.

If you reach your goal, you won't know if it was the advice itself that worked.

If the advice works, you might have paid for it more than it was worth, and it's possible that you might suffer some unintended consequences that make you overall worse off.

The lack of standards and the impossibility of measuring the results of the advice make it easy for good intentioned, but ultimately incompetent coaches enter the market. Additionally, the industry attracts scammers who are just looking to get their hands in the pockets of desperate people.

Someone who's struggling with relationships most likely has underlaying issues that prevent them from forming healthy relationships. If this is the case, most coaches will only give you a band-aid his problems. Actual therapy, although not perfect, is a better option.