It's a classic BigTech marketing trick. They are the only one able to build "it" and it doesn't matter if we like "it" or not because "it" is coming.
I believed in this BS for longer than I care to admit. I though "Oh yes, that's progress" so of course it will come, it must come. It's also very complex so nobody else but such large entities with so much resources can do it.
Then... you start to encounter more and more vaporware. Grandiose announcement and when you try the result you can't help but be disappointed. You compare what was promised with the result, think it's cool, kind of, shrug, and move on with your day. It happens again, and again. Sometimes you see something really impressive, you dig and realize it's a partnership with a startup or a university doing the actual research. The more time passes, the more you realize that all BigTech do it, across technologies. You also realize that your artist friend did something just as cool and as open-source. Their version does not look polished but it works. You find a KickStarter about a product that is genuinely novel (say Oculus DK1) and has no link (initially) with BigTech...
You finally realize, year after year, you have been brain washed to believe only BigTech can do it. It's false. It's self serving BS to both prevent you from building and depend on them.
You can build, we can build and we can build better.
Can we build AGI? Maybe. Can they build AGI? They sure want us to believe it but they have lied through their teeth before so until they do deliver, they can NOT.
TL;DR: BigTech is not as powerful as they claim to be and they benefit from the hype, in this AI hype cycle and otherwise. They can't be trusted.