Personal repositories aren’t production code. They’re learning opportunities. You tried adding 100 engines to a plane and learned that that was a bad idea. Who cares if there’s no cockpit if you were test-driving the wings?
Those look pretty tame compared to some aircraft that actually took flight IRL - like Nemeth Parasol, Vought V-173, VVA-14, Coleopters, Flettner airplanes, and many, many more. Actually, they'd fit well as a following with "the projects they hire you to work on".
This is just off the top of my head from a bit of experience in KSP, but depending on the thrust-to-weight ratio of the engines, it would probably be able to take off, but you're right, it wouldn't win any fuel economy awards.
Actually I doubt any material could stand that kind of wing loading, and the aerodynamics would probably be all kinds of fucked. Pretty apt analogy for a beginner developer.