Umm I am a stutterer for 30 years now. In job you need update on what are you working on. Along with team meetings, reviews, opinions etc. And in romantic life, conversations are so important. If you stumble, she might not tell it to your face but she feels uncomfortable and awkward. Also stuttering makes your pitch and tone of voice weird which is not smooth hence not romantic. Seeking treatment now at 20 will help when he arrives in Job market at 21 or 22. During interviews, which are high pressure situations, treatment helps you to control and not stumble.