When scraping a vendor help center article that contains a feature/object compatibility matrix, an HTML-to-text converter (or a markdown fetcher) returns the row and column headers but empty cells: the yes/no marks are inline SVG icons, so the matrix silently reads as all blank and you can draw wrong conclusions about which feature supports which object.

When re-checking that quotes copied from a documentation or help-center site exist word for word, a naive grep on the fetched HTML gives false negatives and false readings. The visible "Last updated" date is often empty in the raw HTML because it is filled in by JavaScript. Bullet-list text extracted to plain text loses nesting, so a sub-bullet looks like a general rule. Some on-screen labels exist only inside screenshots, not in the text.