Teachers cannot assume an entry level of skill or knowledge and must often present remedial or elementary information. Teachers do not enjoy this. Students are more easily discouraged. Without some background of craft skills, students, either feel overwhelmed, or they disdain hand skills in favor of computer skills. This lack of hand skills often corresponds to weaker conceptualization skills because students do not know the construction processes.
Students are unaccustomed to authoritative teachers.
With all of the laws, students rights, counseling, sensitivity issues, etc. Some faculty are too direct. Students want empathy, they require more nurturing. This exacerbates some faculty. Other students do not readily accept authority.