I feel like a proper Omafiets has a perfectly fine saddle. It's the bikes made for sports, rather than transportation, that have the painful saddles, because supposedly you can't perform if you're not suffering.
There's still a period where you're breaking in your sit bones.
When I got my omafiets a couple years ago my ass was pretty sore for at least a month with daily riding. You aren't really putting any weight on your arms or legs so your saddle is doing the heavy lifting.