1) Trunks with even panel gaps that are well aligned are very much a thing.
Your use of perfect seems to be a slight deflection, even "ok" would have been a fine goal.
But that photo is worse than anything I've ever seen on a car, period. I've seen overblown complaints about panel gaps on Teslas, but most manufacturers would not let that out into a dealership.
2) That's great for you, but it's hardly a defense against general complaints about a car. After all the Model 3 is not the best car others have driven. My most driven car these days is my new S4, a car with less interior noise despite an ICE, comparable performance (I'll trade the .7 second difference in the quarter mile for driving a car not put together with scraps)
3) None of my gaps are so horribly misaligned I ever had the inclination to!
There are two common complaints about panel gaps in general: too big, or misaligned.
I can forgive too big, I really don't care. But seriously misaligned like that picture? It looks like a bad body repair job, and it's right out if the realm of what can be ignored. Not for the sake of others, but for the sake of knowing I paid for a precision instrument and am getting a bodge job.