The non-border parks aren't suffering much unusual damage. That is alarmist nonsense. Toilets may overflow, and piles of trash will form around the trash cans, but this is pretty easy to fix.
The bit in the article about walking off of trails is particularly silly. People will do that or not, unaffected by the shutdown. Nothing will change. Meanwhile, that is actually a serious problem for the border parks. There we have all sorts of unauthorized trails crudely carved through fragile ecosystems.
It is perfectly legitimate to point out hypocrisy and insane priorities, and slapping a silly label like "whataboutism" on it does nothing to change that. I swear, there is something like Godwin's law for "whataboutism".