The use of the word "SJW" is the same kind of social singalling that you attempted to criticize. It's a cheap insult, counter-productive to the discussion, and trivializes the real work on social justice that is necessary for humanity to grow up and become a mature civilization.
I actually agree with the main point you're making, that there are people who superficially attach themselves to social causes for selfish reasons. I am also skeptical when I hear about "serving the public", it's become a meaningless catch phrase by for those who seek to gain a leadership position in society.
And it may be tangentially relevant, that Google hiding the full URL in their brower was done in the name of "improving user experiece", when in fact it's more likely for a self-serving purpose. But that's not "SJW", it's a dark pattern used by corporations and political groups, on whichever side of the artificial divide.
So, I just want to point out that the word has been defined by the media you consume, that there are strings being pulled by the "anti-SJW" side also. It's best to not use that word, otherwise you risk discrediting any valid points you're making.
The most obvious example of this recently must be the 'SJW' that went round on the underground spraying bleach on men who were 'man-spreading' that turned out to very probably be fake.
I feel like everyone needs to learn the 'sniff test' - for things that both agree and disagree with our world view.
There never has there been such a large and sophisticated effort to manipulate the the population by shaping the information that gets to us.
Alternatively, people can contribute to turn back that term into something neutral or complimentary. Protests, for instance, are a good opportunity to find people who can serve as role models.
In that context, I think the connection implied above might be that those pushing for this are infantilizing the end-users by choosing to hide the URL from/for them because they think the end-users can't/aren't good enough at deciding for themselves.
Social justice work definitely includes accessibility. If hiding the URL was about making the web more accessible to the visibly impaired or whatever, you’d have a point worth discussion. A tradeoff between making the web available to everyone and reducing friction for those who don’t need accessibility is a worthy topic to debate.
But this isn’t the case. Nobody is demanding that URLs be hidden for the benefit of inclusion.
Likewise, social justice work involves removing exclusionary and stereotyped language. But hiding the URL bar isn’t about that, either. Nobody is arguing that “http” has racist, classist, or sexist implications.
And if you’re trying to argue that “SJWs” is a blanket term for anyone you dislike, then you are falling into a terrible hole when it comes to both reasoning and constructive debate. Hanging baggage on other people for actions and objectives they do not pursue is deeply broken thinking.
Now to the good point in your comment:
What you speak to about “thought leadership” and “making a name for themselves” is something you find in every organization, and if I had to conjecture, I’d say that progressive people in tech are no more likely to be ambitious than conservatives, libertarians, or just plain people-trying-to-make-a-living.
Your argument, at its core, is about people who do things for their own personal gain at the expense of the product, the company, and the customers/users.
It’s a worthy point to explore, and I suggest that disentangling it from your feelings about progressive voices would improve your argument immensely.
There is no canonical source for living languages.
Dictionaries can only be historical references.
In other words, let the weeds grow with the wheat, and when it's time for harvest toss out all the weeds? Maybe. But if those weeds are going to make the whole place toxic better get rid of them asap.