Is that a plus or a minus? If you're not a purity zealot, then you can step out of those rules where it makes sense, and regard the ability to do so as a plus. If you are a purity zealot, you're appalled at the thought, and want to force people not to do that.
I'm not a purity zealot, I'm a correctness zealot. Working on real projects means working with people who are less competent than they think they are; I want to force those people to not introduce bugs, and I'm broadly indifferent to the mechanism for doing that.
