The real problem is that LaTeX is often an interchange format. Whatever tools you use to write the paper, they must ultimately output LaTeX. In the publisher's

The real problem is that LaTeX is often an interchange format. Whatever tools you use to write the paper, they must ultimately output LaTeX. In the publisher's template, using only the features and packages approved by the publisher, and consistent with any other requirements the publisher may have. The publisher then takes the LaTeX output and processes it further to generate the actual document in whatever format they prefer.