As the factors selected by the engine are variating to create different scenarios, at some point, a 2* and a 7* players inside the team = low or high morale, meaning that in both cases, 2*-7* or low-high the engine can decide the morale as determinant for a match, or not, because the simulations aren't linear or proportional, as this would provide fixed scores based on the AvQ vs AvQ distance between teams + condition, morale, trainings, attane or not , win bonus, and a etc of factors that are never counted all together to influence a scenario.

As the 7 or even 9* player could not be determinant for a gama ena dyou could see how the 2* impacts on the simulation, you could see no effect or effect, coming from a low/high morale.
So the better you have all conditionants = the best, then all is about variabilities provided by rating variations to create different scenarios, conditionants coming from the weather feature, scores cap which is linked to the contributive power and dominance power lists (there are 2 internal parameters that players have) -which, are linked to animations that will be available/unlocked in a match/scenario

That's why it can matter, or not. And same with each one of the conditionants.