Why do multi-valued attributes imply 1:M relationships?

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SUMMARY

Multi-valued attributes in database design inherently imply one-to-many (1:M) relationships due to the nature of how data is structured. When a single entity can be associated with multiple values of a particular attribute, it necessitates a separate table to maintain these values, thus establishing a 1:M relationship. This principle is foundational in relational database design, ensuring data normalization and integrity.

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EdmureTully
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I don't understand why they do, because it doesn't necessarily mean that one tuple is tied to several instances of the multi-valued attributes from another table.
 
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