That take is a bit reductive - it downplays the structural collapse of independent contracting in the UK post-IR35 reform. This wasn't just a "bit of market downturn" or a few companies cutting rates. People lost the ability to operate as businesses, to manage their tax affairs fairly, to invest in their own skills, and to retain profit. What they got in return was, at best, a modest day-rate bump—hardly compensation for losing all autonomy, business deductions (like training, equipment, downtime), and legal protections.
It forced highly specialised professionals into employment in all but name, just without the rights, security, or support. A square peg jammed into a round PAYE hole. And the long-term effect? Exactly what you'd expect: the best talent either left the UK, shifted to servicing overseas clients (where Chapter 10 doesn't apply), or left the field altogether. The real talent pool shrank, not because of market conditions, but because there was no longer a viable way to operate independently.
To make matters worse, the government compounded this by lowering the barriers to import cheaper labour from abroad ("Boriswave"), creating a race to the bottom on wages, with zero incentives for local upskilling or long-term investment in the domestic workforce.
So yes, the job market took a hit - but IR35 didn't just "not help" - it actively accelerated the decline by removing the last flexible, self-directed model for highly skilled work. The damage wasn't cyclical. It was engineered.