Well, people like me appreciate the analysis.
Then analyse this:
I added two numbers together to produce a result of 8.
Which two were they ?
(Clue: I mixed them - no cryptography involved, so should be easy for you
)It will be easy if I put a gun to your head and force you to tell me. Hence the masternode centralization concern.
The gun-to-the-head argument also applies to any coin, including Monero, in terms of giving up keys, access, or association to information.
Dash is far, far more susceptible in that analogy. For Cryptonote coins i.e Monero, you need no external nodes to mix transactions/provide privacy/anonymity. With Dash, the government(s) can take control of the servers the masternodes are hosted on, threaten with jailtime for masternodes owners, etc etc.