There's the step of moving the clothes from the spin dryer to the drying rack, but that's really the only extra effort, and they dry nearly as quickly (~1 hour), either in the sun when it's warm or in front of my house's propane heating unit when it's cold. The drying rack I use doesn't require clips or anything, so hanging clothes is really fast.
I do need to steam certain fabrics to make sure they're not all wrinkly, but people with heat dryers have to iron certain things too.
I'm in coastal New England, so it's not like this is an especially warm or dry climate.
[0] https://www.amazon.com/gp/aw/d/B07TDP2MMQ [1] https://www.bestdryingrack.com/
This breaks the oils/soap that have remaining in the woven fabric, that sometimes harden to encourage a wrinkle pattern. I think…
The water has to go somewhere, and if it's not going down the drain or out the dryer exhaust, it's going into the air. (This may be desirable in some cases to balance humidity).
Same reason that storing wet wood in the basement can lead to water issues in the walls.