Is this an argument for protection of European industries from US capital?
The metrics used account for European industries which are acquired by US firms as American. If it's a zero sum competition, letting US companies aquire EU industries is the EU 'losing'.
Harris basically flopped in the '20 primaries and was most useful as a compromise VP candidate. She's power hungry, but has no principles which would harm Biden's campaign or governing. She has also failed to build her own wide base of support outside the traditional dnc power players.
She may have aspirations for CA governorship, presidency, or a return to the Senate in the future. She's still comparatively young and is likely planning for a long career after the VP.