Same reason Australia, Canada, New Zealand, the United Kingdom, and the United States"have declared that the use of Huawei telecommunications equipment, particularly in 5G networks, poses "significant security risks".

Basically the Chinese cannot be trusted.

Concerns over Chinese involvement in 5G wireless networks stem from allegations that cellular network equipment sourced from Chinese vendors may contain backdoors enabling surveillance by the Chinese government (as part of its intelligence activity internationally) and Chinese laws, such as the Cybersecurity Law of the People's Republic of China, which compel companies and individuals to assist the state intelligence agency on the collection of information whenever requested.

US has the same law.
#5 | POSTED BY ONEIRONAUT

No Comrade Dummy we do not.

While we do have laws requiring Americans to turn over national security related data to intelligence agencies (and not speak about it) they do have to have warrants signed by a judge to get it (due process). And in America you do not have to "assist".

(See Donald Trump vs the Untied States for further details)

"Untied States".

Unintentional but apparently true!