Honestly, most of my concern around AI has very little to do with the technology or its effectiveness, partly because I don't think that technological effectiveness is always necessarily the biggest indicator of what technologies will win in a market. I have zero doubt that a company like Adobe or Microsoft would love to become the gatekeeper of what content gets made and how people make it regardless of whether their gatekeeping actually makes it easier for people to create.
Every big company would love to be the middleperson in-between writers/artists/coders and their creative/professional output.
But even there, there's a big difference between AI being a tool used against normal professionals, and AI taking over the world and putting every programmer out of business. I definitely don't mean to dismiss concerns about access, but I think I'm a lot more bearish about the ability of the modern tech industry to pull off commercializing a genuinely useful, important category of tech without immediately hampering it to the point where ordinary people start to notice and where it stops being a great replacement for the thing it was supposed to replace.
There's a good chance that these tools will be of limited use to individual creators while being very useful in certain capacities for the Microsoft's of the world. If these companies need to choose between making the world a better place or increasing quarterly profits by a notable amount, I don't think there's much question what they will choose.