I think it's like how some of us posters were commenting when it was announced Disney halted construction...there are things you can do, especially in the construction arena, that allow for proper social distancing. It's gatherings of 10 and under not that you can't have more than 10 people on site.
The power plants presently being actively built by my husband's company aren't being shut down. They just adhere to the social distancing guidelines set forth by the CDC.
These construction projects are large enough that you can easily stay 6-10 feet from each other, limit how many people are in one area at any given time, etc. Once you get to interior buildings depending on the size of the building that may be a tad harder. I suspect there are multiple reasons Disney has halted but Universal hasn't.