Eh. There simply weren’t that many of them and they didn’t fly all that much by comparison to fixed wing aircraft.
Over Zeppelin’s history, they flew passengers about 4 million miles and had 13 passenger fatalities. US airlines between 1927 and the end of 1936 had flown about 362 million miles with 181 fatalities. (fatalities per passenger-miles would be a better way to compare, but I can’t find that for Zeppelin anywhere.)
Dang, using the highly flammable nitrate film from the 1920s onboard an airplane just seems like they were begging for trouble. I wonder if it resulted in any disasters.