Ok, I though you might want to expand on it. I gather that when you said it is "generally considered unwise" what you meant was you generally consider it unwise, but that is fine.
But as a response, a poll just came out that indicates 54% of Americans support the strike, and only 18% oppose.
The marginal increase in support for the union strike comes as public opposition to its key demands also grows larger.
pro.morningconsult.com
I think it was very wise for Biden to be there. It is in my opinion the right thing to do ethically, it is also the right thing to do politically. And if this encourages more political leaders to behave in the same way in the future, that is only for the good.
I though it was interesting when Nikki Haley "accused" Biden of being the most pro-union President. I think her comments will soon end up in an ad for Biden.