First, said workaround would completely change the entire structure of your ruby code. Basically, kill blocks. This is inferior to Objective-C itself structure-wise.

Second, and most importantly, this bug is not something that jumps out at you. It only causes crashes in some small % of runs. So, the result is your apps look fine, you are writing idiomatic ruby, but once you release to production, you start getting crash reports because you closed over a local variable that ends up being released. This is the kiss of death for production apps: un-reproducible bugs due to magic in the compiler not working as expected.

In other words, even if you know about the bug, and even if you understand the workaround, if you write code naturally, you are going to introduce crashing bugs that are not reproducible that affect some small but measurable percentage of your users. A true nightmare.