They sort of tried. Around then they had a Windows NT machine that cost around US$12,000. But it was too late. The first serious graphics cards for PCs were appearing, from Matrox and others, with prices of a few thousand dollars.
(I tried some early NT graphics cards on a Pentium Pro machine. This was before gamer GPUs; these were pro cards from tiny operations. Fujitsu tried unsuccessfully to get into that business, with a small business unit in Silicon Valley. At one point they loaned me a Fujitsu Sapphire graphics card prototype. When I went back to their office to return it, the office had closed.)
Also, there was a bad real estate deal. SGI owned a lot of land where Google HQ is now. They sold it to Goldman Sachs in a sale and lease-back transaction, selling at the bottom of the market. That land, the area north of US 101 in Mountain View had, and has, a special property tax break. It's the "Shoreline Regional Park Community", set up in 1969. The area used to be a dump. Those hills near Google HQ are piles of trash. So there was a tax deal to get companies to locate there. That made the land especially valuable.