the shape is a secret sauce so people can;t just copy and past some shape or make it with some curve drawing program. it is easy to spot fakes.
Yes, but this is a double-edged sword.
If you make a logo difficult to copy in subtle ways, but easy to approximate (with most people probably not noticing), then you open the possibility of having counterfeits with a purposedly inexact logo (but looking close enough for the unaware), then reaping some of the benefits of counterfeiting without being an infringement. This is a very common practise.