where are you line drying them? In your bathroom, most people are lucky if they have an outside space to do this when living paycheck to paycheck

Correct. In your bathroom.

Honestly, there is an epidemic of self defeatist in our day and age.

I've lived with people who did that. You put a used diaper in the toilet, and do a couple stir and flush cycles. Then you put them in a bucket with detergent. Once a day, you hand wash those, and hang to dry. With about 20-30 diapers total, you can manage.

But damn, finding used diapers in the toilet is annoying. Plus wet diapers hanging all over to dry. If it's your kid, though, it's not a big deal.

In my area, where relative humidity is often 60-90%, this form of drying would result in moldy cloth, not dry diapers. My guess is Tampa's microclimate is probably similar and line drying isn't an option.

People line dry everything in south-east Asia, in >90% RH. Though I suppose that’s usually out a window or on a balcony.

How do you think people washed and dried clothes there 100 years ago? How do you think they do it in more humid and poorer places today? Do you leave your towel on the towel rack and let it dry there or do you throw it in the dryer every time?

Mold thrives in moist, dark places, not most sunny ones.

A 100 years ago housekeeping was a full-time job, and quality of life was generally pretty bad.

Also the society functioned differently; one middle-class salary could sustain a middle-class family, for one.

We no longer live in that reality, nor would anyone want to.

It's like saying that homeless people are OK because there were no buildings in prehistoric times.

Neither societal structure or quality of life affect the drying time of cloth diapers in humid places.

Edit - and having lived in both, you're much better off drying things in a hot humid place than in colder ones.

We used cloth diapers in a place that's hot and humid but seasonally cold (the US Deep South). Outside on the line, diapers dried a lot faster in the summer than the winter. We ended up having to buy a used dryer for winter use, because they simply didn't dry fast enough to be ready by the time we needed them.