The large tech acquirers have extremely high market valuations partly because of the expectation that they continue to get away with doing exactly this.
If we had more competent competition regulators and this sort of acquisition was basically not on the cards at all, ever, once a company reaches a certain size then that value would stay in the innovating startups until they IPO or are acquired by a smaller, less predatory/monopolistic company. Either way there’s still an attractive exit.
We need to stop inventing reasons to tolerate and justify this behaviour that is clearly bad for society and start pushing for a more diverse tech ecosystem with proper antitrust enforcement.