The thing is that races are good a lot of the time. If I have a set of tasks running in parallel that take an unknown/variable amount of time and I want to tell the users which ones are finished, my output needs to be based on a race between the tasks. If I'm scraping a website, I (may) want to have multiple connections going in parallel, and as soon as one of those connections spots a new link I (may) want to open a new connection to start scraping it, but I don't know which connection is going to spot a new link first, so there's a (benign) race condition.
Making a language that banned them outright would be making a language that couldn't do things that people wanted to do.
