The Wikipedia article on formulaic language (pointed out by another commenter, thank you!) is helpful here.
"There is strong empirical evidence that speakers use formulaic language in similar ways across languages and that formulaic language plays a fundamental role in the structuring of spontaneous speech, as they are used to achieve a better synchronization between interlocutors by announcing upcoming topic changes, delays related to planning load or preparedness problems, as well as speaker's intentions to take/give the floor or to revise/abandon an expression he/she had already presented."
In conversation, formulaic language can help you seem more relatable to other people. Think of Indiana Jones, the beloved hero who often used formulaic language to express himself, as compared with the villains, who barely varied from perfectly formed sentences. You can see the same pattern in countless stories because the writers target an audience that feels more comfortable with people who talk that way.
"There is strong empirical evidence that speakers use formulaic language in similar ways across languages and that formulaic language plays a fundamental role in the structuring of spontaneous speech, as they are used to achieve a better synchronization between interlocutors by announcing upcoming topic changes, delays related to planning load or preparedness problems, as well as speaker's intentions to take/give the floor or to revise/abandon an expression he/she had already presented."
https://en.wikipedia.org/wiki/Formulaic_language (citing a 2007 study)
In conversation, formulaic language can help you seem more relatable to other people. Think of Indiana Jones, the beloved hero who often used formulaic language to express himself, as compared with the villains, who barely varied from perfectly formed sentences. You can see the same pattern in countless stories because the writers target an audience that feels more comfortable with people who talk that way.
https://www.youtube.com/watch?v=SmkJ0lrCpLQ