You would assume so, but then there are domains like .car/.cars/.auto/.sexy which cost more than 2000$ yearly.
All this is speculative of course, but those domains you listed are vanity domains in lucrative markets. I call them vanity domains, because it can easily set you back 3-4 figures to get a domain like me.blog , let alone yourname.cars which is quite desirable if you sell cars. As with everything else, domain prices are simply subject to the laws of supply and demand.
Regarding .io , compared to average country code domains, such as .de for example, that tend to be quite modestly priced, .io has seen substantial increase in the past 5 or so years, transformed from a geeky exoticism to a symbol of AI-hype tech companies.
At least from my perspective.