I don't understand how you video editors can't just sit back and see it for what it is - a senseless design flaw.
You need handles for transitions that require clips to overlap such as cross-dissolve. Well, duh. And even this shouldn't require handles if there was just a "duplicate frames by default" option.
Handles should not be necessary for transitions such as dip to black because overlapping clips is not required.
This is Adobe being lazy and imposing a blanket requirement on two very different transition classes, one that requires overlap and another that doesn't. The end result is this requirement being logical for one class but completely senseless, irritating, and unnecessary for the other class.
Us editors get the shaft because then we have to work within the limitations of the software.