I can understand folks not wanting to do full-time EC.
What I can NOT understand is folks not putting their babies on a potty (or wherever), when they KNOW they're about to poop, when they KNOW they have that option, and insist that they PREFER diapers.
My SIL just had her 2nd baby. Her 1st is about the same age as our daughter, who was EC'd since birth. She saw it in action many times. Her mom -- DH's mom, DD's grandma -- even tried it with DD and was convinced. But she wouldn't try it. At age 3, DD is completely potty independent, and her son was having "problems" getting trained.
He's doing pretty well now, of course, being 3.5yo. That was over 3 years of diapers to change. So she has experienced that side of things, and observed ours all along.
Now comes baby #2. They were in town for a visit over Christmas. "Oh, look, she's going to poop" she intones. "You can tell??" "Oh yes, it's obvious". "So... put her on the potty. Save yourself the mess and the clean-up." "Oh, no... you do what works for your family, we'll do what works for ours. We like diapers."

And she sat and waited for her daughter to poop in her pants. Then cleaned it up. Then did the same thing a half hour later. And 15 minutes after that. This kid is at the age of being a real pooper lol... they came to our house for 2 hours and used 5 disposable diapers.
I mean, when WE tried EC, we weren't convinced. We didn't go into it thinking "this will revolutionize our life". We just figured it was WORTH A TRY, just in case it worked.
So I can't understand the mindset of not even being willing to TRY... when you KNOW your baby is about to 'go', when you personally know a child who was successfully EC'd... what is the remaining stumbling block??? I can understand people who don't know about it. I can understand people thinking it has to be all-or-nothing. I can understand people thinking it would be too messy. I can't understand not taking the simple step of saving themselves a messy diaper to clean up, once in awhile, when they know it's coming and they ARE aware of the option. I mean, many folks come to EC 'by accident' by figuring that much out for themselves. And here we have someone being handed everything they need on a silver platter, and still outright REFUSING to even TRY it. Arghhhhh...
To end on a happy note, DH 'proselytizes' about EC to his co-workers whenever he gets the chance, (like when they have babies) and 99% of the time, people are intrigued and willing to look into it for themselves.