Whataboutism refers to a Soviet-era habit of rhetorical distraction, i.e. "The USSR does something terrible," to which the reply was, "Whatabout the terrible things the US does?"
How does the comment you're referring to add up to that?
How does the comment you're referring to add up to that?
This advancement is objectively good, it's one of the issues raised later in the twitter thread even, and (s)he chooses to change the focus to another subject.
Whataboutism would be "Yeah, well, who cares what Starlink does, NASA launches rockets all the time and no one complains about their emissions"