I sometimes find it odd that religion is often discussed and scrutinized yet astrology and other such practices seem to get a free pass.
The "personality traits" of the various signs are just human traits which everybody has, regardless of what month they happen to be born in.
Exactly. At any point in time, each one of these traits could apply to me. Some days more than others. The only thing that matters is the context. And in specific contexts, some of these traits are amplified, and some of these traits are inhibited. When the context changes, a new set of traits may be elicited to a degree. On the other hand, an individual often has a subset of personality traits that define him or her. Take the trait "emotion" (under cancer). What the hell does that even mean? I've never met one person who was not an emotional being. Further, I know people who have different signs, who express all different types of emotions, and who happen to be emotional people. Another one is "appreciation." Zodiac signs are way too general to mean anything. Further, the issue becomes when it doesn't apply to someone. I love when you tell astrology that X traits do not apply to me. Then what? Do zodiac signs only apply to some people, and not others?

Aries Aries symbol March 21 - April 19: Active, Demanding, Determined, Effective, Ambitious
Taurus Taurus symbol April 20 - May 20: Security, Subtle strength, Appreciation, Instruction, Patience
Gemini Gemini symbol May 21 - June 20: Communication, Indecision, Inquisitive, Intelligent, Changeable
Cancer Cancer symbol June 21 - July 22: Emotion, Diplomatic, Intensity, Impulsive, Selective
Leo Leo symbol July 23 - August 22: Ruling, Warmth, Generosity, Faithful, Initiative