Clichés have always been a vital part of the English language. They are part of the fabric of the English-speaking people of the world. Learning English clichés will bring you a deeper understanding of the language and its various cultural influences.
Every language has its own proverbs and truisms, old truths borne out over time; the Chinese call them idioms. Surely you know many from your own native language.
People love to hate clichés, but they’re not so bad if you just remember to think of them as parts of the ancestral history of a culture. To ignore the clichés of a language is to turn your back on the people who make up that culture. Each one is a history lesson as well as being a fitting thing to say during a conversation, a speech, or a letter.
As you contemplate a cliché, wonder at the life being lived by the one who said it. What assumptions did they make? Were they right?
So, when you sit down to study a language, respect the clichés. Learn what you can. Gaze into an ancient life. Some of them will wash over you without meaning; others will open up your world to common wisdom beyond your native culture.