Ironically, your comment is an example of a narrow view mindset that software engineers who work on React and Javascript are somehow not equivalent to "real" engineers. I don't think that's a balanced view in an industry where a large percentage of companies have web-related products and employ engineers to work on them.
Truth is almost none of us are "engineers". (meaning a very strict discipline, often with licensing, and with very real consequences for failure after you sign off on something) I'm fine with that, but I'm also fine with the colloquialism of "software engineer" (same way I'm ok with "crypto" meaning "cryptocurrency" if we all have an understood context)
However, I usually interpret comments like this to suggest things like the backend is "real software engineering", which while being literally incorrect, it's also a very narrow view of our craft. I think the pushback is similar to the traditional ops folks pushing back against "devops" or the way people make the same, predictably pedantic comments about any "serverless" article: it represents an encroaching on their expertise.