If you feel awkward coming to Nim after getting so used to braced languages, believe me, after a while you will get used to it and maybe end up preferring it in the end.
Discussions about syntax can be important (to provide an extremely arbitrary example: Nim doesn't "cheapen" the syntax at the expense of reducing abstraction between it and the AST in spite of its AST macros, unlike Lisp/s-expressions) but they also tend to run headfirst into superficiality (we're not here to see C++ dressed up like Python, the semantics are more important than anything else) and subjectivity.
That being said, it helps to understand the philosophy of Python's syntax (which Nim borrows from): braces were originally just there to make the compiler implementer's job easier. They've since become rationalized to be apparently important in conveying where scopes begin and end, but they're not the main thing we actually use to demonstrate a scope, which is indentation. Why not cut out the stuff we don't really need and use that already-existing pattern of indentation to provide the semantic of scope?
With a mouse it should be position your cursor anywhere between the parentheses click again to select the symbol, click again to expand the selection to the current parentheses etc, fistart typing
with vim ci) after first having spent 18 month learning the convoluted non intuitive key sequence (a la vscode) to perform the magic.
That action isn't common enough to learn a dedicated set of commands for, which is the whole problem with Vim (that and the fact that its custom commands only work in Vim and Vim-compatible places, which the OS is not one of).
At the end of the day, what it comes down to is whether editing the text is the real bottleneck. It would be nice to see this studied.
Vim-like input mode have steep learning curve that traditional IDE but eventually for regular user, most command are down to muscle memory and you don't even have to remember it's ci) but your fingers "knows" it.
Those who never took the time to master Vim but mastered other tool will find Vim less productive and will prefer other tools; on the other hand, those who mastered Vim will keep on using Vim and find it more productive.
Ultimately, this is a sterile debate because :