This applies to every line item in the constitution. The federal government can fail to do their duty on practically anything. It doesn’t mean the Court is now obligated to change the reading to make it effective in a different way just because one of the other branches is inept/corrupted. I agree with you though, the insurrection clause is practically worthless in this era.
Funnily enough, it’s hard to see how the framers of the amendment didn’t foresee a second Confederacy-like being incentivized to work to corrupt from within to break all these new tools. Then again, it’s hard to come up with a scheme that truly blocks the possibility of an uprising this large without trampling on freedoms or causing disastrous consequences. (As much as I want trump gone, I really didn’t want the future where every election season was watching court cases by sleazy lawyers in all 50 states, shifting even more power to the judiciary)