I think the problem here is "Just in Time" delivery to the Auto Manufacturers. It takes about 12 days on the water and another 5 on rail to reach the rust belt or east coast. So that is probably why they decided to start producing in the USA so they can meet tighter production and delivery schedules and take shipping lines/ports out of the equation.
That said, you're right--I don't remember too much trouble shipping raw glass. It was just coated in Lucite and the first sheet is always a write-off. We had more trouble when people had packs fall when trying to load them into the gantry every so often, though broken sheets were quite a pain to deal with sometimes more from a safety perspective, when the crane can't get suction on it to drop it and it's too big to safely handle.
The author makes it seem like Fuyao's decision to build in Ohio is part of a larger trend across verticals, when in reality the nature of the glass industry demands Fuyao building local to suppliers.
For example,"float glass" is not manufactured in New Zealand - no windows have been made there for 25 years, every single one is imported.
It seems that at the scale these plants operate, it's not economic to run one for a country of 4.5 million people (with a first world minimum wage) without tariffs or subsidies.
Many glass mills need to be within a certain mile radius of the factories they supply because of this. NYT missed this in the article.