What I would do is to express your pessimism lightly, or more like, "we are making these assumptions about a new technology we know little about" (pick just 2-3)
Then push hard to convince them to carve out little pieces to try out the supposed "AI changes the economics of building software." and other assumptions. Say something like "how can we validate these assumptions with the minimal effort/time/money, because I've seen some horror stories and not sure the hype holds up. I'm all for it if it works, but we just don't know and we need to chip away at that"
My personal take is that this idea they have will end poorly. I've worked hard and built custom agents to squeeze more out of them (my gem-3-flash is better than copilot with anything impo.), and my takeaway is two-fold (1) they can be both impressively good and unbelievably bad, even the very best models from any company (2) people are sharing their wins far more than the fails, like stonks, the outcomes you can find in the wild have bias. I know I delete a bunch of false starts, gonna be hard to automate this and not spend more than you would on a human, especially as the project grows. You are going to have to pay to load a bunch of context on every run just so the model can go from tickets in Jira to finding what/where needs to change, to getting actually relevant code changes, then making sure they work.
That doesn't mean you cannot build a newer, better, competitive product. You surely can. But you need to build the understanding of the market yourself so you know when the LLMs go off the rails and get them back on track.
Most of the rest comes down to inertia and path dependence.
The new lossier models are rarely an improvement over existing less lossy models. That is why there was an old style model in the first place. Putting in the work already had value. And it delivers value now.
Specifically, self-promotion is not the reason to be on HN, though it is allowed in small doses. Pimping your product on most every comment is not the way. Likewise, most of your comments read as straight copy/paste from ChatGPT, which is also frowned upon/banned.
You'll find that HN is welcoming of people and their ideas and products, so long as you engage as a community member instead of treating us like a marketing channel.