It's a sign of bad resource management. Why does whatsapp need 600mb if a native messaging app uses fraction of that? Why does atom/vscode (electron apps) need

It's a sign of bad resource management. Why does whatsapp need 600mb if a native messaging app uses fraction of that? Why does atom/vscode (electron apps) need to use gigabytes of memory, when I can open two orders of magnitude larger files in a native app with two orders of magnitude lower memory consumption?