Why keep a dog and bark yourself?不是指“为啥养狗咬自己？”而正确的含义是既然花钱雇人，为何还亲自动手？

【例句】
I don't know why she's vacuuming when her cleaning lady is coming over tomorrow. Why keep a dog and bark yourself?
我不知道她的清洁女工明天要来，为什么还要吸尘？既然花钱雇人，为何还亲自动手？
 

Don't be silly, Ellen. Why keep a dog and bark yourself?
别傻了，艾伦。既然花钱雇人，为何还亲自动手？