People are lazy and impatient, so they just want to go. Untill they seeit for themselves that an AFKer is hurting the group and them personally, they won't want to do anyting about it and instead, be at odds with the first complainer.
But tbf, We probably would have done more to listen to the first complainer if he didn't brag and call us all f-ing morons the whole time.
Lots of younger people who are not fully matured. Lots of adults who feel their real lives are so complex that they'd rather not put time and effort into "learning" something new.