Guess the profession!

I help when you're sick, With tools and a trick. What am I?

I write on the board, And knowledge is stored. What am I?

I catch those who steal, With badge and some zeal. What am I?

I steer through the air, With people in my care. What am I?

With combs and a snip, I give hair a flip. What am I?

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With a camera and charm, I build up my brand. What am I?

I work with heat, To make food a treat. What am I?

I run, jump, or play, To win the day. What am I?

I speak to a crowd,
To make them laugh out loud.
What am I?

I film and I post,
Online I’m the host.
What am I?