OTP is deeply impractical. How do you distribute your pads? (hint: it's a chicken-and-egg problem, you need a secure channel) How do you ensure they're only e

OTP is deeply impractical. How do you distribute your pads? (hint: it's a chicken-and-egg problem, you need a secure channel) How do you ensure they're only ever used once? In its most obvious instantiation, you get no authentication. So now you have to build an authentication mechanism on top. There's simply no point, when we have better solutions already. And to top it all off, symmetric ciphers aren't threatened by quantum computing in the first place.