Do you do the screening too? Are you sometimes handed resumes without further information?
Answer yes to any of these questions and you'll realize that you can't do your job if the resume doesn't have a title. (Unless you spend 10 minutes to decode it). You simply don't know what's the job of the candidate and can't forward to any team/manager.
You can look at the Employment/Work Experience and see his current (and past) roles. A good resume has this information easily available that you can get to it within 2-3 seconds.
Shall I remind you that the resume before you might be for a secretary and the resume after you might be a construction worker trying to reconvert. The resume pipeline is not limited to developers or your team ;)
Not to mention the challenge with people writing the meaningless official titles from their companies and people having 10 years of experience in different roles.
You can demand that everyone involved in recruiting scan your resume for 10 minutes and understand the last 10 years of your life. Most likely, that won't happen and your resume will be discarded half the time.
Answer yes to any of these questions and you'll realize that you can't do your job if the resume doesn't have a title. (Unless you spend 10 minutes to decode it). You simply don't know what's the job of the candidate and can't forward to any team/manager.