Locked hardware isn’t much of an issue either. Most of that either can be unlocked or there are equivalently powerful unlocked alternatives to be had.
What people must seize is the network, and the network effect. Most of today’s tech empires are built on owning the hub around which everyone communicates. The fact that they own a lot of hardware is just about irrelevant to their market power or dominance.
The only area where compute power determines relevance at all today is AI base model training and large scale AI deployment and that is likely not going to last that long. In the next few years the market for accelerators for AI is going to heat up a lot and prices will come down. There is no way the nVidia monopoly will last more than another two years tops.