Totally agree. And if you want to trivialize any attempt to improve the marine environment that we all dive in by calling it a "feel good" measure, or imply that it's not helpful, that's up to you. But I'm not sure why a voluntary effort to encourage less disposable plastic bottles fits into that category.
Of course, I certainly understand why it would be a political team-sport football.
It seemed pretty politicized from the start as are most posts from the OP.
And of course questioning the effectiveness of a particular policy at accomplishing anything real isn't the same as "trivializing any attempt to improve the marine environment", another exaggeration/caricature.
It's another much ado about nothing partisan outrage post honestly.
For starters the title is a complete misrepresentation. The Obama era administration didn't implement a ban on single use water bottles in national parks, not even a ban on their sales. As you point out it was merely a suggestion to voluntarily try to limit the sale of bottled water which was only followed (voluntarily) by a small percentage of parks, 5%.
So this "reversal" is a big nothing burger, in that the 5% of parks might go back to allowing more sales of bottled water, while still encouraging reusable bottles and of course anyone bringing their own bottled water into the parks will continue to do so entirely the same as before.
There really isn't a story here other than Trump administration did something, we need to believe it's terrible.
Now as far as actually wanting to do real things to minimize wasteful plastic use, I don't think a single person (in this thread at least) disagrees with that.