I think you might be missing the point of the article.

I agree that the term "semantic ablation" is difficult to interpret

But the article describes three mechanisms by which LLMs consistently erase and distort information (Metaphoric Cleansing, Lexical Flattening, and Structural Collapse)

The article does not describe best practices; it's a critique of LLM technology and an analysis of the issues that result from using this technology to generate text to be read by other people.