I'm assuming you mean all those new 'AI wrapper' startups popping up.? I wouldn't say "every tech company". But yeh it seems incredibly easy, definitely an easy win and leaders get to feel ahead of the curve on AI.
1. they don't have the resources to build their own technology and probably never will
2. even if they did have, the best they could do is come up with something very similar to OpenAI's GPT, i.e. a (somewhat) generic AI model. This means that OpenAI can also easily compete with them.
All these companies are doing (if anything) is that they test the market for OpenAI (or Google, MS) for free.
If you can move fast, deliver, expand, and raise money, there's a good chance the AI wrapper lands a nice exit and/or morphs into a tech behemoth. Those outcomes (among others), even if mutually exclusive, are equally possible.
Assuming that the advance made in the meanwhile in AI doesn't eradicate the whole thing. I mean say some company builds a personal assistant for managers to supplant secretaries, they become the go-to name and then Google buys them in 2-3-5 years. Unless Google's AI becomes so good in the meantime that you can just instruct it in 1-2 sentences to do this for you.
The key is, if the incumbents truly feel they can't breach whatever moat, M&A is the safer bet over agonizing what if (I am thinking "git wrapper" startups that saw plenty competition from BigTech; remember Microsoft CodePlex, Google Code, AWS CodeCommit?). Given Meta's push and other prolific upstarts (OpenAI, Mistral), I don't believe access to SoTA AI itself (in the short term) will be an hindrance for product-based utility AI businesses (aka wrappers).