For questions with only a handful of answers, it is indeed definitely enough, as long as it's actually a random sample without too much bias. Going to larger nu

For questions with only a handful of answers, it is indeed definitely enough, as long as it's actually a random sample without too much bias. Going to larger numbers but with the same bias in sampling of people won't give an better answer! So the actual question is how they checked that their sample is representative and not too heavy on any demographic.