We are doing real harm to our aging economy by not facilitating these bright young minds to stay here.
The article is such a pathetically transparent piece of anti-labor rights astro-turfing: China is going to out-compete the US unless US workers can be forced to accept equally shitty working conditions, that I cannot believe Hacker News is taking it seriously.
The issue with the pace of development bring quicker doesn't just come down to labor rights. Shenzhen is the world's biggest electronics manufacturing hub, so it can be easier to iterate quickly with manufacturers there. The article does indeed interview someone who complains about Americans supposedly not working long enough hours, but that's actually a pretty widespread view in China about Westerners.
The take away from the networking thing is Trust. You need to be able to demonstrate you can be trusted, that you're not secretly a bunch of kids in a trenchcoat or a fake, Western-sounding name that's a front end for a few Vietnamese kids putting out shit-tier code.
There's lots of VC money in China right now and most talented Chinese tech people have offers waiting for them in China that are both very high level positions with very high compensations. So even if you want to stay in the US on the one hand you have people back home offering you insane opportunities and trying very hard to incentivize you to return, and you have the US government essentially trolling you to make a point about how unwanted you are (from their perspective).
The fact that the current US policy is effectively working hard to drive away very talented people who want to be here but have plenty of good offers elsewhere will do plenty of long term harm (for the US).