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.
Tell us just ONE that is as capable and effective as Figma.
Designers don't use Figma because it's "trendy", we do it because it's the best tool for the job. The only free tool that comes even close to being good enough is PenPot, and even that is years away from being a true competitor.
There are collaboration tools in Figma that simply do not exist in the competition, so your ability to list tools that are also capable of drawing rectangles with round corners doesn't mean anything if you can't properly manage a design system that is reusable with a team of a dozen designers or more.
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.
Does it sound like Scarlett Johansson? If not, no.