Voting machines are hacked every year at DEFCONs voting village. They're wildly insecure and no one should trust them. Frankly, any claims of manipulation of voting machines are at worst plausible.
So, your point is entirely irrelevant.
You logic is flawed at the core. With that train of thought you can infer everything.
Why trust voting it can be manipulated.
All voting systems can be manipulated, there's no need to make it so easy though.
[my recommendation: try to build a high trust society instead of patching epicycles onto the side of a low trust one]