... not that I especially trust Monero much; not even as much as Tor. What I object to is the tendency to be too quick to go ahead with the assumption that it probably has been broken even in the total absence (such as in this thread so far) of any evidence to demonstrate that.

It's the same misguided instinct that leads people to believe that all encryption is futile, that the NSA already knows all the keys no matter what we do. It's not really true. It is true they can easily compromise the security and privacy of any one of us normal people they choose to single out, but for those of us who don't practise unreasonably strict op-sec the point of choosing secure and private modes of communication (including monero if your sense of morality allows for the use of a proof-of-work cryptocurrency) is not to protect one target against all possible threat models. And it's not only to protect against lesser threats. Much of the time the most important thing is to contribute to the effort to make it impossible for anyone to systematically spy on the whole world all at once. Nobody should have that power.