Simply taking away some giant precursor for the advancements we enjoy today and then assuming it all would have worked out somehow is a bit naive.
I would need to see a very detailed pipeline from growing wheat in an agrarian society to the development of a microprocessor without fossil fuels to understand the point you're making. The mining, the transport, the manufacture, the packaging, the incredible number of supply chains, and the ability to give people time to spend on jobs like that rather than trying to grow their own food are all major barriers I see to the scenario you're suggesting.
The whole other aspect of this discussion that I think is not being explored is that technology is fundamentally competitive, and so it's very difficult to control the rate at which technology advances because we do not have a global government (and if we did have a global government, we'd have even more problems than we do now). As a comment I read yesterday said, technology concentrates gains towards those who can deploy it. And so there's going to be competition to deploy new technologies. Country-level regulation that tries to prevent this locally is only going to lead to other countries gaining the lead.