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I disagree. It isn't reproducible AND people make mistakes and then present papers and other outcomes that later is shown to be false.

Spreadsheets are treated as Swiss Army Knifes. People believe all they need to do anything is Word and Excel.

What could the same people who are using excel have used instead that would have prevented them from making an error in their steps of calculation?

When dealing with non tech-savy people on data (reports), Excel is perfectly fine (especially pivot tables, conditional formatting, etc...).

Anything else is obviously a mess - and people can use gDocs or OpenOffice for that as well.