You mean like they did in the 80s and early 90s just instead of a CAD program or a CFD program or both they used a pen and paper and did basic by hand drafting...Those cars saw a wind tunnel and drafting board plenty, it wasn't some miracle of imagination all of a sudden like a light bulb. Um it's racing...and as others said the fin and swan neck serves a purpose which has been proven (even though you tried to disprove it not that long ago as far as the fin goes). But to the racing aspect it's always been on the extreme from six wheel cars, to snowmobile fans, to ground effects, to active suspension, TC, and to even current ideas like internal body aero and coanda effect among other things.
All of this (which depending on what type of engineer you are you'd know) is from as far back as the late 60s/early 70s to now. All of it was or is extreme and all of it was solved with different yet similar methods. Every excuse you've given to being hung up on this modern era could be quantified to past eras because they did the same thing to get success. Extreme is what this type of sport is about and what creates winning, you thinking it's extreme and wrong for that is what's silly. Stick to DP.