Meaning of the word "standers-by see more than gamesters" in English

What does "standers-by see more than gamesters" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

standers-by see more than gamesters

US /ˈstændərz baɪ siː mɔːr ðæn ˈɡeɪmstərz/
UK /ˈstændəz baɪ siː mɔː ðæn ˈɡeɪmstəz/
"standers-by see more than gamesters" picture

Idiom

people who are watching a situation from the outside often have a better understanding of it than those who are directly involved

Example:
I know you're stressed about the project, but remember that standers-by see more than gamesters; maybe you should ask for an outside opinion.
The consultant pointed out flaws we hadn't noticed, proving that standers-by see more than gamesters.