This could absolutely be done by drilling, and you can see that from the method the 3D sketch was created: it’s a solid object, with the holes virtually drilled out.
The only potential problem I see is that, as you rotate the blade between each drilling operation and then drill new holes, is it possible for coils of material to build up in the previous holes in a way that’s impossible to confidently clear out by simply blowing through them, or by passing a bit back through each hole? The fact that you have this tiny Swiss-cheese structure, and that it’s impossible to place a bore in every hole simultaneously, makes me wonder if this might be a hard problem.
