Gaps in my bite despite having braces?

[choy360]

https://imgur.com/a/1JjyDmt

attached above are pics of my teeth right now

my dentist says there's nothing he can do to close these gaps because that's just how my teeth shape are and maybe it's because I only have 12 teeth on my top and bottom

is this really the case or should I get a second opinon?

 

[Geparddent]

The job looks well done, I suggest you trust your dentist as there are times the problem you described is true