How are you going to get more competition when the entry cost is so high? The only competition will be the Chinese willing to dump endless cash into this but they are not doing it out of the goodness of their hearts either and it will still take years. If NVIDIA starts to falter then in the short term things will get even more painful for consumers as AMD becomes the new crummy company people love to hate.
At which point customers are buying for hardware price/performance or performance/watt rather than because they care which vendor they're getting it from.
And then you'd still have the biggest companies making the highest performance hardware, but you could also get something from the RISC-V people which had e.g. half or a quarter the performance of the enterprise GPUs but the same amount of VRAM, for less money.
People seemed to be programmed to be sycophants or at least willing victims to rich and powerful people and companies, even as they royally screw them and empty their pockets. I never understood it. As the song goes: we'd make great pets.
The barriers to entry are not capital costs they are compatibility moats. Wake up and smell the coffee.
They're just another rank monopolist. We should celebrate their fall, maybe there will be room for some real competition.