Are you suggesting that speaker wires be sold in sets of: EQUAL LENGTH; one wire 2 ft longer; one wire 4 ft longer; etc. etc.; and then have a nominal set length of 10 ft pair, 12 ft pair, 15 ft pair, 20 ft pair, 25 ft pair.... whew!

You would have 5 x 3 = 15 different sets just for the above.....................

Don't you think this would complicate things excessively and unnecessarily?

Wire cutters are a lot more convenient.... don't ya think?