No one can be an expert on all science - but if you really think hard that once you have a grasp on it - it doesnt change often and it's pretty constant - so assuming that is true then what is the variable tjhat will change more often? Science or the stock relative value and risk/reward?
The answer is obvious - and while the science may help - its pretty much a constant and doesn't change often. What will change is the ebb and flow of investor sentiment. If you know that the science is sound or not you can make entry/exit decision based on relative value or risk/reward objectives.
I will seldom hold an investment until the very top - but conversely we will seldom have a large postion that hits us very hard because we are very disciplined on entries/exits and having a backstop.