Compute continues to get cheaper and cheaper. We have not hit the physics wall yet on that.
That and if someone cracks efficient distributed training in a swarm type configuration then you could train models Seti@Home style. Lots of people would be happy to leave a gaming PC on to help create open source LLMs. The data requirements might be big but I just got gigabit fiber installed in my house so that barrier is vanishing too.
Though the other day Yuval Noah Harari gave a great talk on the potential threat to democracy - https://youtu.be/LWiM-LuRe6w