Sorry, I meant professional company emails. Obviously people can make up whatever private gmail account they want. And people can state their preferred name, but the fact that if I call my coworker "Josh" and their last name is "Jacobson", the fact that I can type in Josh.Jacobson and find them is extremely helpful, and I don't get why companies would complicate that by making it "jojacko" .
I mean yeah, but it happens even more with the naming scheme in the original post. Most companies just add a number when that happens. Predictable naming schemes, at least as the default, make it a lot easier to find people in large companies.
2=2
2^2=4
2(22)=2^4=16
2(2(22))=2(24)=216=65,536