I think this is true in the short/medium term, hence the confusing picture of layoffs but growing number of tech roles overall. The limit maybe be just millions of companies with one tech person and a team of agents doing their bidding.

Maybe software engineers will be like your personal lawyer, or plumber. Every business will have a software engineer on dial, whether it's a small grocery store or a kindergarten.

Previously, software devs were just way too expensive for small businesses to employ. You can't do much with just 1 dev in the past anyway. No point in hiring one. Better go with an agency or use off the shelf software that probably doesn't fill all your needs.