That's just one perspective and I disagree with it.
European carmakers are where they are because electromobility reset their legacy advantages (a lot of which they built up more than half a century ago on much cheaper wages); now the same dollar amount gets them less R&D output than in China, because engineers are more expensive, and production itself is difficult to keep competitive for the exact same reason (also why a lot of car production has shifted east into lower wage European countries long before Chinese cars became competitive).
If wages were significantly lower because of more labor migration, the industry would (obviously) be more globally competitive as well (I'm not saying that would be desirable, just that it's a given).
European carmakers are where they are because electromobility reset their legacy advantages (a lot of which they built up more than half a century ago on much cheaper wages); now the same dollar amount gets them less R&D output than in China, because engineers are more expensive, and production itself is difficult to keep competitive for the exact same reason (also why a lot of car production has shifted east into lower wage European countries long before Chinese cars became competitive).
If wages were significantly lower because of more labor migration, the industry would (obviously) be more globally competitive as well (I'm not saying that would be desirable, just that it's a given).