“Two heads are better than one” and “Too many cooks in the kitchen ruin the broth” also aren’t necessarily opposite. It reminds me of the phrase “two’s company, three’s a crowd”. It’s possible for two to be better than one while three (or an even larger number) is too many. Another fun saying along these lines is “A man with a watch knows what time it is. A man with two watches is never sure.” which seems to usually be used to mean that if you have only one source of information you can become overconfident, whereas if you have two then you won’t know which is correct if they contradict, and even if they don’t contradict you are more likely to be aware of the fact that they could be wrong. Another one is “a camel is a horse designed by committee”
“Two heads are better than one” and “Too many cooks in the kitchen ruin the broth” also aren’t necessarily opposite. It reminds me of the phrase “two’s company, three’s a crowd”. It’s possible for two to be better than one while three (or an even larger number) is too many. Another fun saying along these lines is “A man with a watch knows what time it is. A man with two watches is never sure.” which seems to usually be used to mean that if you have only one source of information you can become overconfident, whereas if you have two then you won’t know which is correct if they contradict, and even if they don’t contradict you are more likely to be aware of the fact that they could be wrong. Another one is “a camel is a horse designed by committee”