It's not claiming to be a scientific law; it's a heuristic for making decisions. The rest of Taleb's books are also about making decisions, not "being right" (whatever that means).
A concrete example is if I'm writing a blog, and I want people to read my posts in 5 or 10 years. Do I go with the cloud platform that just launched or an older hosting provider? This is a decision people make every day. Of course there are many people who don't care if their blog is readable in 5 years; this isn't a judgement.
The Lindy effect is not about what's "better"; it's about what lasts longer. It's also not making statements about the present, which is what survivorship bias typically means.