You can grab a hammer, which is great but grabbing Maul of the Skyclaves is also a very common play pattern when it can let you push lethal damage
When modelling something like this, there are two ways to go about it: You can either use brute force, collecting a large enough statistical sample to build a model, or you can try and figure out the underlying mechanism
After you have taken 2 damage and the Damage Step has ended, you can then use this [Opponent's Turn] effect to add 1 card from the top of your deck to the top of your Life cards.
Literally all of it all of it
And like Lightning Bolt, the once omnipresent Counterspell was eventually phased out of Standard play to allow creature decks more room to breathe
Albeit, that profit margin would be around $1 or so, though its still a profit at the end of the day