The "beneficial" property you're referring to is "can be easily used to fund criminal behavior", which is typically not a desirable feature in a payment system. Many people believe LibGen/Sci-Hub are good forms of breaking the law - but if that is the case the solution is "make the things they do legal" rather than "make it easier to send criminals money over the internet".
It typically is. The alternative is a system where a central authority has absolute control over all monetary transactions, which is definitely not desirable.