No, a non sequitur would go something like this:

Bob was plantings some flowers. He had to replace his helmet.

Not a non sequitur:

Bob crashed his motorbike. He had to replace his helmet.

It might have been better if they’d written something about how a helmet needs replacing after any impact, sure.

This is an interesting logic discussion. :-) Does the term non sequitur apply to correctly formed statements where the conclusion of the statement is incorrect? I would be inclined to agree with TheSpiceIsLife and say no. Because the article is based on limited sources, the article's conclusion about helmet replacement is incorrect, even if it's well-formed.

EDIT: Here's an interesting list of non sequiturs, many of which fit the same pattern as the article. I think loeg is probably right after all.

https://examples.yourdictionary.com/non-sequitur-examples.ht...

Also it's important distinction because mightni imply to reader they wouldn't otherwise have to replace a helmet which is dangerous.