Mexico has none of the actual infrastructure or skilled workforce needed to be an actual manufacturing powerhouse that makes things from scratch
Care to share your sources?
Eh they do a lot in Vietnam in reality. And yeah Chinese own a lot of these factories directly or indirectly, but a lot of the money (and the toxic fumes) stays in Vietnam.
What people forget is that starting with assembly is one of the basic things needed to get a leg-in into ramping up into a manufacturing powerhouse.
And then suddenly, as if overnight, everything moved to China.
https://www.visualcapitalist.com/us-largest-trading-partners...
[0] - https://georgewbush-whitehouse.archives.gov/news/releases/20...
[1] - https://en.wikipedia.org/wiki/Permanent_normal_trade_relatio...
Yes, people claimed that during the era of the maquiladoras... it has not materialized 30 years after.