It's roughshod but very reasonable.
The US is vaccinating fast.
There is a 'rough sequence' that people should be following.
Some gears in the system will be off, and some individuals will act poorly - but that's ok, it doesn't need to be perfect.
Speed of delivery probably takes preference over secondary quibbles about order of priority, as long as there roughly is one.
Take solace in the fact the US is way ahead of other nations, and thank God, because the amount of 'anti lockdown' populism in the US I feel has been considerably higher than in most other places and I don't think the population could handle any more lockdowns or more assertive measures without some very ugly populism in the streets.