Perhaps for the same reason I run NoScript ( 1/2 :-) ?
OPTs obviously devolve to the key distribution problem.
The environment of client side Javascript is obviously to me a superset of the key distribution problem. After all, you start out by distributing your code to the (insert your favorite derogatives here) client.
Simson Garfinkel likes to refer to the whole https game as something like transferring a valuable from a cardboard box in an alley via an armored car to a park bench. I'd end with the end of a Matt Groening Love is Hell quote: "At night, the ice weasels come."
Why is the relationship between OTPs and Javascript crypto (apart from them being routine signifiers of crank cryptography) intuitive to you?