Very valid point. Phrasing and dynamics are critical points for good singing. Eaxh mic system has its pros and cons and Its been discussed here before. I briefly tried a headset but go with a fixed mic on a boom arm. Others swear by their headsets, whatever is best for your total predormace.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer