Look, if we are going to converse on stuff like this, you are going to need to begin supplying scripture to back up your theological speculations.
You have to understand, stiggy, that not all Christian doctrine is explicitly described in scripture
Take, for example, the concept of the Holy Trinity
Surely, you're not going to deny that the concept of Father, Son, and Holy Spirit being both separate and same is a fundamental aspect of Christian belief and, yet, nowhere in the bible does the term "Holy Trinity" ever appear!
{And, no, I didn't call you Shirley!}
Again, I don't think one need always refer to scripture in order to accurately identify and assess a given precept of Christianity
That said, I can and will provide biblical support for my assertion that Jesus consciously, purposefully, and needlessly 'tossed us into the deep end knowing full well that we cannot swim'
Psalm 51:5
"Behold, I was brought forth in iniquity,
and in sin did my mother conceive me"
Psalm 58:3
"The wicked are estranged from the womb;
they go astray from birth, speaking lies"
Job 15:14
"What is man, that he can be pure?
Or he who is born of a woman, that he can be righteous?"
Each of the above verses make clear that we are born into sin - born with corrupt natures that inevitably compel sin thus warranting our damnation
And it goes without saying that this is by the conscious and purposeful Hand of God
Going back to your lifeguard analogy - it fails because, unlike the lifeguard who did nothing to effect a drowning, it was Jesus, Himself, who created us destined to drown
