The layman looks at the excitement, and the expert looks at the doorway.

Doorways, tricks and methods of doing things. A layman refers to a person who has no understanding or experience of something or a job. An expert refers to a person who has rich knowledge and experience in something or a job.

It means: insiders see things as the way to see the essence, while laymen can only look at appearances and excitement.

This kind of performance is also explained in psychology:

Perception is the overall reflection of the human brain on the objective things that directly act on the sensory organs. At the same time, there are many stimuli acting on people, but due to the limitation of information channels, people can't clearly reflect all the stimuli, only the stimuli that are important to them, which is the selectivity of perception. The stimulus that is clearly reflected is called the perceptual object, and the perceptual background is vaguely reflected.

Therefore, for laymen, "excitement" is the perceptual object and "doorway" is the perceptual background; For "experts", the situation is just the opposite.