This is actually a great move for US workers because many of these US embassies in other countries, including India have been merely rubber stamping visas for foreign workers for decades.
Millions of foreign workers have entered the US in the past 20 years to take jobs merely by going to a US consulate or embassy in their countries to “get the stamping done“.
Now those offices will be closed, vastly reducing the ease with which foreign workers can get their US visas stamped for entry. This will vastly reduce the flow of foreign workers into the US to take skilled jobs.
+1 Trump and US workers.