IMHO:
LaTex was machine code of publication - the world moved on to wysiwyg only about 30 years ago. Any publisher that only takes submissions in that archaic language is being rather stoneage. Camera / publication ready copy can be created in so many easy to use tools that to insist on using an ancient relic just places unnecessary barriers to entry.
If that same publisher does not provide article templates just vaguely worded "guidelines" then you know you are dealing with a publishing dinosaur or paper generating mill that provides no value add - look elsewhere.
Sure LaTex was a good and relatively bug free system, used by many, but pushing authors to be typographical mark up compilers is like asking painters to be chemists and make their own colours.
