I don’t disagree with the notion that there should be more medium sized, self sustaining (“lifestyle?”) companies, but such statements are rarely if ever followed up with _why_ this is a desirable outcome for everyone involved.
I guess it comes back to how you view the current system. If you find the idea of unicorns and acquisitions and the further centralization of capital distasteful, it's kind of self-evident why you'd want to see something that represents a break from that norm.
For me, yes, I see the obvious argument that more money leads to more (and faster) innovation. But it can also result in an economy that is too tightly coupled and dependent on the might of a few massive companies, whereas an economy that is distributed across more smaller businesses is more robust.
At the extreme, you might imagine South Korea: a country that is highly consolidated into one or two major cities and propped up by massive, economy-shaping corporations. I don't think anyone would disagree that Korea made massive economic strides in a short period of time, but I think there's much more debate about the long-term health of the Korean economy and people now that their continued prosperity is so centralized.
And, of course, there's the consumer angle; though I can't claim any scientific methodology, my impression of the sentiments surrounding this merger are that it was pretty popular with Figma's investors and employees (understandably so, as they stood to gain from the merger), but was deeply unpopular with their customers. You could make the argument that "a Figma owned by Adobe is better than no Figma at all," but consumers have seen it all before at this point: a good product is acquired, and then either a) the pricing model changes, b) the rate of innovation slows down, c) the product is ultimately abandoned somewhere down the line, etc, etc. None of these outcomes are essential truths, but they are common outcomes of companies getting larger and larger to the point where a business unit that is otherwise healthy is deprioritized because it is not profitable enough or growing fast enough for the larger parent to care; or, conversely, the smaller parts suffer because the larger parent encounters trouble and can no longer sustain their acquisitions, even if they are keeping the bloat afloat.
