More parts per sheet, some small parts are made from that same sheet, less tools to stock, less tool changers.

But I could get away with a 3mm cutter on that part without an extra tool change, I've done a finish pass on some 10mm acrylic with the same 2mm cutter to give a clean cut in the past.

Only really any good doing full clean up passes on new cutters or soft material other wise you still get cut lines.