Ratio spreads to both sides of the market - assuming the account is suitable. The second side would have no requirement and may trade near flat. Not perfect and not riskless.
Do risk profile charts take that into account? The delta will be increasing as the price gets closer to itm. I was messing around with it here: https://optioncreator.com/st3ul40 At $20 I'm losing the same money with or without the put.
Looked at what you posted, but it doesn't approach what I outlined - your payoff doesn't approach what I outlined and is simply a synthetic call option, but good luck.