It's not really about optimism or pessimism, it's effect vs no effect. Self reported anecdotes like yours abound, but as far as I'm aware the effect isn't real. That is, it's not in fact true that if a business buys AI tools for its developers their output will increase in some way that impacts the business meaningfully. So while you may feel more productive using AI tooling, in fact you probably aren't, actually.
No. If you're trying to make a causal link between some layoffs and AI tooling you need to bring the receipts. Show that the layoffs were caused by AI tooling, don't just assume it. I don't think you can, or that anyone has.