That why using linix are your os and either tor, brave or duck duck go for browser is a safer. For anything you want kept safe have a one way only air gaped sytem.
What they are fearful of is a dos from a local.bot farm. It’s way harder to stop as you can restrict flow of bandwidth from offending country. Anyone who runs windows 10 and apple are vulnerable due to nsa having its best hack and back door key stolen and sold on dark net about 9 months ago.
This is why no back doors should.exist it’s easy for others to exploit along with government abuse of power .