[1 i] Opening day had to be pushed back as the result of a month long labor dispute between owners and players.
[1 ii] Since the library's purchased archives are primarily from large and well-established publishers and vendors, the head of Acquisitions concluded that losing access to content as the result of publisher failure was a small risk.
[2 i] One of his many achievements in a career spanning 60 years was to instigate pollen counts and send reports to the media, as a result of which the pollen count is still included in weather forecasts today.
[2 ii] I think there's no question, because we know as a result of these undercover investigations, as Jane just mentioned, certainly there have been food recalls. (COCA)
Examples in  have definite articles, while  indefinite ones. In my eyes, they can be interchangeable, and s need to have the meaning definiteness and have to select ‘the’. But RHD says it, as the result of, is seldom, if ever, used (This dictionary being Korean version, I don’t know the original wording.) What makes the phrase take ‘the’?