The problem with the 747 analogy is the implied assumption that there is a “goal” that evolution is heading towards. Because there is no “goal”. It’s just various natural pressures increasing, or decreasing, the probabilities that an organism with a given trait (some tiny tiny difference from other members of the species) will manage to raise babies. There is no end-game, no “result”, there’s just a lot of “here are the critters who are around at the moment”. All slightly different from one another in various ways. Religious folks always seem to think there must be a “goal” or “plan” in nature for some reason.
So a tornado at a junk yard will not blow things around and create a 747, but with enough tornados hitting that junk yard they might blow things around until it’s mostly things which are heavy and have a round, aerodynamic shape that are left sitting around the junk-yard. Evolving that junk yard to be one filled with heavy round things that can’t blow easily. The tornado is an environmental pressure which makes being “non-blowable” a favorable trait.
