Both perspectives are important, but, overall, the advantages of proper in-house teaching outweigh the drawbacks.

drawbacks 是名词 drawback 的复数形式。drawback 由动词 draw（拉、拖）和名词 back（后面）组成，字面意思是"向后拉"，引申为"阻碍、缺点、不利因素"。在这里指内部教学可能存在的不足之处。