What is the disadvantage of end to end encryption

In end to end encryption, the conversation between two people is completely secure where it is a matter of advantage in a way but it also has some disadvantages, it can also be used in a wrong way by wrong persons.

Any kind of false information, rumors and provocative content can be sent and no one can monitor them.

The government or police cannot see the data of WhatsApp, which can be used for illegal and wrong purposes.