I wouldn't over-analyze. Third person intros are very common on personal websites, especially for folks who often give talks, invited lectures, or are written

I wouldn't over-analyze. Third person intros are very common on personal websites, especially for folks who often give talks, invited lectures, or are written about in the press. If your personal website starts with a short intro written in 3rd person then the person introducing your talk/lecture will, 9/10 times, simply read out your own description of yourself. Reporters will summarize the key points when introducing you in a story. Assuming the person speaking/writing about you is favorable or neutral, you control exactly how you're framed. If you write the intro in first person or have an overly pithy description, then they'll sort of make their own intro which could go well or not so well ;-)