Sometimes you do a perfect job, and sometimes you do a bad job perfectly.
But to avoid any more wordplay: Sometimes you need to use a flawed technique to achieve an end. You can execute that flawed technique perfectly, but that won't make it a perfect job.
Indeed, the 'perfect path' in life is not perfect. Life has so many paths, everything is a trade off. Spent more time with your kids? You loose time with friends etc. Whatever you do or choose in life, it means you can't do all the other stuff.
But to avoid any more wordplay: Sometimes you need to use a flawed technique to achieve an end. You can execute that flawed technique perfectly, but that won't make it a perfect job.