"I am no longer able to sell my product in the market since it has been commoditized to the benefit if everyone else" is not the same as "I have been robbed".
From the start OpenAI started with semantically overloading the "AI is an existential" risk argument from "AI is going to make me starve" to "AI is going to go rogue"
I don't really see AI as an existential risk (nor something that'll single-handedly starve people nor "go rogue" - unless one defines that as something like "having CVEs").
This is less about AI, per se, and more about corporate -vs- personal IP rights. Historically, IP law has bent to benefit large corporations while citing personal IP rights as the raison d'être (& never fulfilling on that justification). What OpenAI (& many others) are doing here is just very flagrantly demonstrating how that justification was only ever an excuse, & that restrictions imposed by the Berne Convention, et al, have never really applied to corporations at scale (outside of small case-by-case exceptional examples).
The livelihoods being stolen are not being stolen by AI - rather it's a further reinforcement (scaling up) of a system that has been doing so for well over 100 years.