There's no point in comparing "Oooo bought 8 years ago so it's cheaper" to today's rents.
The relevant questions are:
(1) for someone making the buy/vs rent decision today on the same house or directly equivalent houses, is it cheaper to rent or buy? That then brings in questions like over what time period do they expect to be in that home, do they have a deposit, and if so what return could they get on the deposit by investing it instead?
(2) for someone who owns a property they don't need to live in, are they better off renting it out or selling it? That then brings in questions like local wages and demand, other overheads of landlording, capital commitment, how long before they need an income and so on.
It's entirely possible that even though renting is more expensive than buying over 10 years person A is better off renting for 3 years than buying and selling over a short period than being hit with stamp duty and maintenance that mostly benefits the next owner.
Similarly, it's entirely possible that since the cap on both mortgage and rent is the occupiers' affordability, a landlord looking at a 10+ year investment is happy to rent at a loss at first to secure the property at today's price, knowing over time she can increase the rent as inflation pushes up wages.