There are a few possible reasons why Google dropped the motto "don't be evil."

The motto was too vague and subjective. It was difficult to define what it meant to be "evil," and different people had different interpretations of the motto. This could lead to confusion and disagreement within Google about how to make decisions.
The motto was too ambitious. It was unrealistic to expect that Google would never do anything wrong. Every company makes mistakes, and Google is no exception. The motto "don't be evil" set a very high standard that was difficult to live up to.
The motto was becoming outdated. Google was no longer the small startup that it was when it adopted the motto in 2004. The company had grown into a massive multinational corporation with a wide range of products and services. The motto "don't be evil"
was not as relevant to this new Google.

In addition to these reasons, Google may have also dropped the motto in response to criticism from some employees and the public. Some people argued that the motto was hypocritical, given that Google has been involved in a number of controversial
activities, such as collecting personal data about its users and censoring search results in China.

In 2015, Google reorganized under a new parent company called Alphabet. Alphabet adopted a new motto, "do the right thing." This motto is similar to the old motto "don't be evil," but it is more specific and actionable. It is also more consistent with
Alphabet's mission to "organize the world's information and make it universally accessible and useful."

Ultimately, the decision to drop the motto "don't be evil" was a complex one. There were a number of factors involved, and it is likely that Google weighed all of these factors carefully before making a decision.

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