This is an underrated point, and something I don't think most people outside of the high level Machine Learning/AI world take seriously.
It's also one of the biggest challenges for the industry going forward because of natural monopolies. I say that because if AI is electricity then data is the coal/oil that drives it.
The big technology players have a massive advantage in their ability to build and deploy tools that collect the data, and then bring it back to be turned into "electricity." If we aren't careful they will be the only groups who can make progress and show actual real world ML driven capabilities - making the barriers to entry even higher.
If you just look at the computer vision space, to do really good Machine Vision you need a LOT of novel image data and the primary platforms creating image content are largely owned by the top 5 players in the form of collection (smartphones) and warehousing (cloud servers).
I'm not sure if there are solutions here that make it possible for a lot of companies to do really well - everyone will just be bought up or out competed by the bigs once the big ones notice a threat on the horizon.