I'm sure I'm not alone in feeling the "deep expertise" OP laments was actually deeply inconvenient to many people. I understand that there's a good living to be made from knowing browser quirks, hand-rolling accessible components, mastering CSS specificity, but this is largely accidental complexity. More people building things is straightforwardly good, and if some of those things are slower or less accessible, that'…
Why is that straightforward? As an example, right now every year on Steam there are thousands of games released. A lot of them are just shovel ware that nobody ever plays, but it does end up hiding actual quality stuff in the noise. Same thing happens in app stores. Gatekeeping that limits opportunity is bad. But gatekeeping around quality is very good. Wanting your software to be written by someone who cares about software and has expertise is, to me, more straightforwardly good.
Right now people are blaming vibecoding for decline in a lot of mature software products, whether that's fair or not (I think it's frequently unfair). I think there's a possibility that's going to morph into "AI First" companies being seen as poor quality brands. Already we see in games that when listed they have to disclose if AI was used or not, and if it was, it damages the credibility quite a bit.