B1,
I believe you have raised some reasonable objections.
1. This strategy provides LIMITED downside risk compared to owning the underlying outright.
2. This strategy LIMITS FULL upside appreciation compared to owning the underlying outright. (a little more on this later.)
3. This strategy does not take FULL advantage of premium capture by selling upside and downside exposure at the same time.
However, I would like to point out some previously addressed comments by the OP.
1. OP has chosen a style that makes him comfortable, and he is not overleveraged. (I know you agree with good risk management!)
2. He has chosen a strategy that is not very time intensive. Yes, he could just own SPY (even less time intensive), but he has a desire to "attempt" to beat the index. OP could trade SPY or SPY options, but that is more time intensive.
3. OP has explained his strategy varies from the "traditional wheel" by selling weekly premium and attempting to sell calls at high enough levels that give him a chance to capture decent sized weekly appreciation when SPY has been "put" to him.
Certainly, cases can be made for selling, buying, or trading options. Certainly, cases can be made for buying, selling, trading stocks/etfs.
Points for further discussion:
1. You mention he may not have considered dividends and interest. Do you believe these variables are not "priced in" regarding option prices?
2. Many (non margin) account types may not "allow" for all option strategies. For example, IRAs and other retirement accounts may not allow selling spreads, much less nakeds (i.e. naked calls) Therefore, selling strangles may not be an option for all. Even in margin accounts, it is possible strategies may be limited due to account size, investor/trader experience, etc.
I'm sure you can appreciate that the OP has selected a "long only" instrument for his strategy. I am glad he has shared his journey, as I am glad you have shared yours.
Good trading all,
Newbie