If you think of any word and say it to yourself over-and-over again, eventually it loses all meaning and just becomes a random sound in your head. Parrots can speak perfect English, without having any idea about the meaning of what they are saying. The ability to repeat words, does not also mean you have the ability to use those words in meaningful conversation.
For the purposes of pronunciation, repetition is a useful tool. Repetition is also one of the most popular tools currently employed by comedy writers and performers…
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I was watching a TV program recently about the construction of the first Russian Arctic shuttle tanker, the “Vasily Dinkov”. The ship was being built by the Samsung corporation in Korea, however some important parts of the ship’s engine/motor had to be shipped from Russia. Because of this, they had to send a special team from Russia to help with the installation. The interesting thing about this was, the leader of the Russian construction team had been promoted and sent to Korea, mainly because of his ability to speak English!