Suppose I'm a bad guy with Trump, I command the credit card company to issue 1 million fake cards with names which are passed away in last century. Ask my agents to sweep these cards and vote for me. How could you civilians prevent these things from happening?
Security flaw, sometimes may not root in technology side, but politics side.
China is treating everything they own as a politics weapon now. 5G contract is a perfect weapon in this view. Telecom infrastructure is huge, and almost monoplied by the base infrastructure builder due to compatibility issues. Once Huawei finished the 5G base infrastructure, China can coerce UK by attach extra terms for maintaining, upgrading or selling 5G equipments.
China has already used this approach on loans of asia investment bank. The countries which supports HK Security Law coincidentally matches with the countries which receives loans from
investment bank.
Some may still remains to be conspiracy theory: China increased production of hydroxychloroquine, in their reports (http://tn.china-embassy.org/chn/dtxws/t1787078.htm), they already used Chloroquine in treating their patients. However, WHO, FDA and even Lancet banned or announced inefficiency of hydroxychloroquine, and people died from this misinformation. What role did China play remains suspicious and mysterious.
America, wake up