Who repairs a two week MacBook Air cracked screen without Apple Care+?

Warranty is for manufacture failure. Insurance is for accidental damage. AppleCare+ is actually a bit of both.

Proving a screen broke 'all on its own' is going to be extremely tough. I'd check your regular household insurance coverage for 'accidental damage'.

^{A bit of insider knowledge goes a long way here;) If you claim this on insurance, they will likely impose a lien on any future claim - i.e if they give you 2 grand now & you break another one, the first 1500 will be on you next time.
So, you take the 2 grand from the insurance - in your hand, or in the bank, not in vouchers & not in any "we'll pay for it" or "give us your old one" manner. You want the 2 grand and the broken computer in your hand.
You take this 2 grand & the broken computer to an Apple Store [not a 3rd party] & ask them if the broken one has any trade-in value. Also request that they safely destroy any data on the old one [this is why you take it to Apple, who are trustworthy in this].
You take the trade-in value, give them the rest of the money out of your 2 grand… & pocket the change [or keep it against that lien they imposed for if there's a next time.]
This is all actually legal & above board, but don't try it twice.}