In some cases, this sentence is reasonable because some hooligans may seem to be misbehaving, but they may not have a high level of education. They may only use some simple means to achieve their goals, and these means may not be legal. However, under certain circumstances, it was not advisable for a hooligan to be cultured. If a person only learned some superficial skills and methods but did not have real culture and quality, then he might still be a hooligan. On the contrary, if a person had rich cultural knowledge and accomplishment but used improper means to achieve his own goals, then he was also not desirable. Therefore, this sentence was correct in some cases but not necessarily correct in some cases.