I agree with your point. I'll add that for new developers and those without the traditional CS background (both of whom are my target audience for this guide) spending the extra time is a learning experience for them that can make them better developers.

Ultimately, it's not the applicant's choice what the parameters of the interview process are (I commend you for working to make it better) - given that, why shouldn't an applicant try to give themselves an edge in the process?