Both Musk and Bezos are businessmen. There is still competition among businessmen to do business the best way - directing the right people to work on the right

Both Musk and Bezos are businessmen. There is still competition among businessmen to do business the best way - directing the right people to work on the right things. But don't confuse this with actually making the products themselves. One can be a good businessman or a bad businessman, but this has nothing to do with engineering. (Arguably, the best thing Musk did for SpaceX as a businessman was to delegate all the business to someone else. He tends to ruin companies where he does not.)