I’m not sure what you mean exactly but I think you might be missing the point. Google is using chromium’s ubiquity to exert control over how the internet works. Chromium being so ubiquitous makes it so web servers can lock out other web browsers.

If you want the entire internet to work like an adobe product, where one company has absolute control over it, then yeah your analogy works. But the whole point is people don’t want that.