As the saying goes, an expert looks at the doorway, but a layman looks at the excitement. Used as a metaphor to illustrate the difference between an expert and a layman.

Explanation: An expert refers to a person who has rich knowledge and experience in a certain thing or job. Doorways, tricks and methods of doing things. A layman refers to a person who has no understanding or experience of something or a job. The whole meaning is: insiders see things as the way to see the essence, while laymen can only look at appearances and excitement.

There are many doors with buttons.

1. It is usually a huge doorway with towers on both sides.

2. Possible ways and means.

3. Skills and abilities. It also extends to the context. Strangely, I don't see any doorways.