hold on, you say “ Because…
hold on, you say “ Because it is a single gigantic piece of aluminum, […] people were rightfully worried…” and then later say “… but rather, you can break off a section of the giga cast and replace only that part.”
What do you mean by “replace only that part” if the frame is one big piece? Surely if a piece of wood snapped in a construction project you’d replace the whole plank? Your logic doesn’t line up here.