If "we should help people" is a partisan position, then sure. Not everything is political. The stuff about taking down corporations is divisive and partisan. Beating up bad guys is not divisive. Nor is repelling alien invasions. He used to be more about having fun adventures and taking on colorful foes.
And that gets to your "political cowardice" remark. He's supposed to be fun. He has his roots in pulp penny dreadfuls and four color sci fi. From there he became a very colorful and fun character. But as the audience aged, they felt like they needed superheroes to be deeper to justify their guilty pleasure. But the best depth comes not from being topical or allegorical, but from being applicable
See Tolkien's notes on Applicability:
That's what allegory is. Purposed domination. That's what Grant Morrison did. If you don't agree with his worldview, you can't invest nearly as easily in this new version of Superman.I much prefer history, true or feigned, with its varied applicability to the thought and experience of readers. I think that many confuse 'applicability' with 'allegory'; but one resides in the freedom of the reader, and the other resides in the purposed domination of the author.