I refute that sir, and I will have at you again, and dash you with my glove.
Anything more complex is more likely to go wrong due to the number of parts and systems involved. If you can't see that, I can't help you.
You don't believe my rocket v bicycle analogy?
Some niches are best filled by simple organisms, eg,
living in the interstices of rocks miles below the surface of the Earth.
And other niches are best filled by complex organisms, eg,
omnivores who hunt, fish, scavenge & eat plants.
Subterranean extremophiles, despite their simplicity, would
fail utterly at bringing down a woolly mammoth with spears.
Another in the analogy war....
You & I are using computers which are vastly more complex than a slide rule.
But computers are reliable enuf to displace the simple reliable slide rule in its
environment, ie, people who need to calculate things.
Superior function is what matters. This trumps simplicity.
For those unfamiliar with one, here is one of mine...