G. E. Moore (in his Principia Ethica, 1903) makes a very similar case to this relation to consequentialist ethics:
"The first difficulty in the way of establishing a probability that one course of action will give a better total result than another, lies in the fact that we have to take account of the effects of both throughout an infinite future. We have no certainty but that, if we do one action now, the Universe will, throughout all time, differ in some way from what it would have been, if we had done another; and, if there is such a permanent difference, it is certainly relevant to our calculation.
But it is quite certain that our causal knowledge is utterly insufficient to tell us what different effects will probably result from two different actions, except within a comparatively short space of time; we can certainly only pretend to calculate the effects of actions within what may be called an ‘immediate’ future. No one, when he proceeds upon what he considers a rational consideration of effects, would guide his choice by any forecast that went beyond a few centuries at most; and, in general, we consider that we have acted rationally, if we think we have secured a balance of good within a few years or months or days."
If a noun denotes a group of people – even if it's technically a singular noun – it's okay (but not compulsory) to use a plural verb.
The sentences 'Real Madrid have performed well this year' and 'Real Madrid has performed well this year' are both grammatically acceptable, and probably used roughly the same amount.
A related example is the word 'none' (= 'not one'). Technically it should govern a singular verb (e.g. 'None of the players is good enough') but you'll now see it a lot with a plural verb (e.g. 'None of the players are good enough').
Another problem with advice is that in lots of cases the person giving the advice has absolutely no skin in the game. If the advice is bad, it’s only the advice-taker that suffers.