Business model or commercial model?

Business computing such as word processing and spreadsheets, database software, requires very little processing power. So you're making an apples to oranges comparison.

For apples to apples, check the specs on pro stuff for yourself: https://www.amd.com/en/graphics/workstations

The pro stuff is essentially double the processing power, and double the price. The difference is in process threading and number of cores. Rendering huge video and CAD projects, for example, would take forever on a gaming rig, because that kind of rendering software is optimized for threading, game processes are not usually optimized or not as optimized. For example, there are some games that will only use one core of even a dual core processor.

I'm sure someone that knows much more about this stuff will correct any errors in terminology. Anyway, that's my take on the question.

Initially I thought, well, what graphics processors do they have inside commercial gaming systems, such as a high-end training, flight simulator, or racing simulator. They use the RTX 30 and 40 series.

Generally, hobbyist and consumer grade products are not meant to be used 40 hours a week, such as commercial products are. It's easy to see huge differences in these sort of products on things like lawn mowers, refrigeration. Even in televisions. Your television in your home is likely not meant to operate 365 days a year like the ones you find in a hotel lobby or airport. They just have higher quality components and engineering, designed to withstand long-term, high volume use. They use better glue.