There is a tremendous amount of money in those high capital costs enterprises. High tech can make you a lot of money, but you can also go bankrupt when everyone buys from your competitor - just like everything else. The world needs the things that heavy industry makes, and despite the large capital costs they are valuable. People are still making a lot of money in those industries - even if it is less than the silicon valley can make.

Also industry is only low value so long as someone friendly to you has it. The world really worried about China climbing that latter because they are making some political moves that could lead to war. Maybe they won't, but China clearly is building a powerful military and they are not friendly to the freedoms that the US and western Europe likes. If it comes down to war we need heavy industry.