It's unfair to merely critique the headline. If you do not wish to watch the video, here is a transcript: https://www.youtube-transcript.io/videos/elvEcWc7U7c
"This is very important work." is just an opinion.
"The more precise you nail down these uncertainties, the more theorists can do to verify their work, allowing the experimentalists to know where to look for new stuff, if any." Sabine's point is that there are countless theories and parameters that can be changed to fit any measurement. New results will eliminate some, but it will not reduce the total number of possible theories, as others will be constructed to fit the results without having any reason to think one is more true than another.