There's a huge difference between understanding tools/libraries/frameworks/programming languages/APIs etc vs understanding how to build a system on top of any of these things that scales well, is maintainable, is easy to collaborate with others on, that can be extended quickly, that doesn't cost that much time/money to build in the first place, etc.

Yes the former changes every 1-5 years. Doing the latter well is much harder, no single tool can solve these problems, and I think years of experience really does help.