There's nothing interesting here.

China is not a liberal democracy and is guilty of many human rights violations.

If you want to use Huawei devices, go ahead, it's a personal choice, but preferring Chinese devices for security or privacy reasons is just plain stupid.

And the parent's argument is textbook whataboutism.

Yes, the US has active spying agencies. Irrelevant for the topic being discussed.

"guilty of many human rights violation"

the history excludes any other country but China.. is that what you meant?

So then what’s the difference between “whataboutism” and “perspective?”

To me, OP put things in perspective.