I'd be all for holding politicians in charge accountable, but that's where everyone gets squishy depending upon who they support?

One guy's being wrong becomes another guy's "not that big of a deal".

By what metric will you measure "being wrong" for this COVID-19 pandemic? A super cut of video clips showing a reluctance to believe uncertain information coming out of China? Death rate compared to other OECD countries? Whether or not the great Hydroxychloroquine efficacy debate goes one way or another? Whether or not the ban of flights to/from China were effective?

When you are not in charge you can say whatever you want, it won't kill people. So that's why it matters. It's not about who you support. "The Buck Stops Here".

People will die of this in every country on earth. Are all in charge responsible for every death in the country over which they preside?

"With great power comes great responsibility"

it's an ideal, not a metaphysical necessity. But we need to enforce the ideal because otherwise the powerful use their power to their interest and against their detractors. It is absolutely essential to hold them responsible for their decision making process if we value life in a liberal democracy or a classical republic. They cannot get every decision right, but they must at least get them wrong for a fair reason.

Otherwise it's just "personal responsibility for the many, riches and fiefdoms for the few"

Depends on what they did to avert it. In many cases the answer is 'too little'.