The thing about the phrase "moving goalposts" is that you already know the established rules of the game and everyone agrees on them, so to "move goalposts" is akin to changing the rules to fit your objective. It's not fair to use the same expression with a global pandemic where we still can't even agree on the ground rules like how many people will actually take the vaccine, how long the vaccine is effective, etc...
The difference between the start of this pandemic and now is that we have 15 months of data from multiple sources. We now have "established rules of the game" but each side cherry-picks the ones they want to follow.
The virus has been well-analyzed. We have multiple vaccines. We have experience with different mitigations and have data that shows which ones are and are not effective. Some of the assumptions we made at the start were right. Some were wrong.
The time for wishy-washy answers (such as the ones that Dr. Fauci continues to give) to important questions is over.
The problem we run into is that people are locked in to their sides and cannot admit they were wrong. That's why "we still can't even agree on the ground rules."
It was wrong to deny that masks work.
It was wrong for families to have large indoor gatherings.
It was wrong to end indoor mask mandates too soon.
It was wrong to open bars.
It was wrong to disregard social distancing.
It was wrong to send infected patients into nursing homes.
It was wrong to say we'll never have a vaccine.
It was wrong to require masks to be worn outdoors.
It was wrong to close down outdoor beaches and parks.
We didn't know this 15 months ago.
We do now.
Both sides have been wrong on multiple counts. Neither side will admit it.