lest they turn back and be forgiven- 4:12

Why such a method?
Jesus answer is- lest they turn back and be forgiven. - Which on a first reading doesn't seem particularly satisfactory- or loving or gracious perhaps.
Doesn't seem to convey quite the same spirit as John 3:16-17 For God so loved the world that he gave his only son, that everyone who believes in him may not perish but may have eternal life. “Indeed, God did not send the Son into the world to condemn the world, but in order that the world might be saved through him...
Though reading on judgement is clearly here-
Those who believe in him are not condemned; but those who do not believe are condemned already, because they have not believed in the name of the only Son of God. And this is the judgement, that the light has come into the world, and people loved darkness rather than light because their deeds were evil. For all who do evil hate the light and do not come to the light, so that their deeds may not be exposed. But those who do what is true come to the light, so that it may be clearly seen that their deeds have been done in God.”

Ask, and it will be given you; search, and you will find; knock and door will be opened for you. For everyone who asks receives, and everyone who searches finds, and for everyone who knocks, the door will be open” then Matthew records Jesus saying basically that God is good and for us.

I don't think it's possible to be too prescriptive about how people come to God or Salvation- Saul wasn't particularly looking for Jesus- Jesus came looking for him- blinded him- and sent him on a different path. However, I think there's things here that hold generally true. God does not make it too easy- mostly he does not come swooping down on the clouds and clearly reveal himself to the whole world (though I imagine there's places where they do experience amazing things corporately- towns and villages). It may be there is a certain amount of parable weaving going on. I think he does seek everyone (what do you back that up with? John 3:17?)(1 Tim ...) - But not much will happen unless the soil is good- there are epiphanies happening in people's lives all the time- he is sowing- often through his servants- but unless people follow the threads and ask, and seek and knock, they will experience condemnation. Where does Paul say- “without faith it is impossible to please God”. Nowhere- it's in Hebrews- ll:6 ..., for whoever would approach him must believe that he rewards those who seek him.”
Very much I'd say, God wants us to exercise faith- Abraham's faith credited as righteousness. Hence, Jesus enigmatic quotation on being enigmatic- So that seeing they might see and not behold, and hearing they might hear and not understand, lest they turn back and be forgiven.