I was answering yuneeqs Qs. I rarely buy calls and when I do it to close or as part on a complex position. But the two reasons you mentioned seem rational to me. If you are short the funds to buy the stock out right ( that's related to leverage which you mentioned,) or downside protection which can otherwised be achieved with a stoploss. Stoplosses can fail on a gap down or in a steep crash.
That is what I wanted to point out - if you want leverage, a more effective method may be to buy on margin, and if you want downside protection there are other ways to obtain it. As you mention, stop loss is not a sure thing, but pairing a put option with your stock buy is a sure thing. Buying a stock on margin + put option might not be more cost effective than buying a call outright (though it can be, e.g. if you're taking a contrarian position), but it can have a better return profile for the cost.
My purpose in commenting is to stimulate some thought and discussion for the self-proclaimed investment novices.
I personally share your view in that I only buy call options as part of a larger strategy, and not merely to take a bullish position on a stock.