Just sptiballin' here, but…
Because the people who built them wanted the robots to resemble them?
PF thought al V-22s were grounded at this time. Due to the Chinese shoot down of one in the Sea of Japan that the US government is calling a crash of unknown origin. But spotted this one this morning. First one PF has seen since the entire fleet, across all US service branches, went into effect.
https://globe.adsbexchange.com/?icao=ae4ecd&lat=32.537&lon=-91.931&zoom=5.9&showTrace=2024-01-28