Of course XMR + Put is superior from a probability of profit standpoint (as shown by your lengthy explanation of put/call parity), but naked XMR is better still. People aren't (as far as I can tell) buying calls based on POP, they are buying them for the leverage. In this case, it's quite costly.
XMR + Put is equivalent payoff to Call + BTC as i have argued. Naked XMR is neither better nor worse from profitability perspective, it's just a different risk profile. XMR has downside risk that the Call payoff does not have.
My point was just to say that the *optionality* of the call option is much cheaper if you buy it through Put + XMR instead of buying the outright calls.
With regard to leverage it is true that a *naked Call* is higher leverage than *XMR + Put* however the premium you pay on the optionality does not justify it in my eyes. For the same reason, the break-even level for XMR + Put is lower than the naked Call. Therefore, if someone is a bit short on capital AND really want to play options AND wants to target maximum leverage they should probably buy a combination of Call, Put and XMR to optimize their break-even/leverage metrics.