Whilst the reason may be singularly obvious to those who consume various forms and sources of media, there's likely enough people that only consume re-published whitehouse press releases and the trump administration probably already has an alternative explanation that they'll use for these increased prices.
And their target market will eat it up and ask for seconds.
Like a doomsday cult, with each failed prediction they will just keep pushing back the ostensible payoff. So far, we've seen "I will end inflation on day one" -> "this is still Biden's inflation" -> "there will be a little bit of pain" -> "the system has been broken for decades and it will take years to fix".