The same is true of moral character, which as the post points out is a better predictor of future behaviour than an absolute measure of prior contribution.
But the main takeaway is not how we assess people in the world as it is, but how do we set up the world in a way where everyone's efforts lead to their optimal potential merit, which is incentivised by rewarding effort at each step. Part of effort is also thinking about the effectiveness of your efforts, but also many efforts might be seen as pointless and futile until they are not, scientists who contributed to the Covid vaccine had been doing seemingly pointless work for decades until it finally became relevant to MRNA vaccines.
And on the other hand, it is entirely possible to put fairly low effort into profitable ventures that are detrimental to society—porn, alcohol, sugary foods and get rewarded for it. An effortocracy would seek to tweak the incentives differently.