Don't you overestimate an evening with strace and tcpdump a little bit as a "quality of service measure"? In my experience the reasons for high request response

Don't you overestimate an evening with strace and tcpdump a little bit as a "quality of service measure"? In my experience the reasons for high request response times are very easy to find, but not necessarily easy to fix. So at best it takes 30 minutes to find the root of the problem and 30 minutes to come up with a fix, at worst it takes 30 minutes to find and half a man-year to fix an entire stack.