That could perhaps be explained by the fact that Zeplin does not have in any way the same goal as Figma.
Zeplin is not a design software, it's a presentation and sharing platform. Yes, the one-trick pony is easier to navigate than the software used to create the damn ponies, that's not much of a surprise.
It is not irrelevant. The simple truth is that designs in figma are absolutely useless unless they are being accessed by non designer. And as a non designer myself I find search and navigation quite lacking. Other aspects, like dev mode, are good, though.
It is absolutely irrelevant. Your point is the equivalent of saying that a kid's bike with side wheels is easier to ride than 500cc racing bike, therefore racing bikes are just a "trendy choice" and people are silly for using them on races.
Ignorance is not an excuse for your bad arguments.