My argument is somewhat more sophisticated than your strawman. If you fully learn Altium, I can guarantee you (since I fully know Altium) that you know pretty much all you need to know about EE, especially since every situation an EE is likely to encounter in Real Life is part of what Altium provides.

So sure, if you do NOT know your tool inside and out, then that's a hacker's knowledge. To be a professional, you know your tool(s) inside, outside, and backward.

So yes, if one knew Altium inside, outside, and backward (incl SPICE sim & FPGAs), then such a person knows EE very well.

It's a small, limited domain. THAT is my point.