Yet, the professionals they got to sing it svcked at doing so.
Those were professional voice actors, not vocalists.
That's because you're not an expert.
1crit·ic noun \?kri-tik\
Definition of CRITIC
1a : one who expresses a reasoned opinion on any matter especially involving a judgment of its value, truth, righteousness, beauty, or technique
b : one who engages often professionally in the anolysis, evaluation, or appreciation of works of art or artistic performances
Where in that definition does it state that the critic must be better than the person they're criticising at whatever it is they're talking about?