Some changes to tighten it up a bit. Wiggle words aren't good hooks, and they rarely add useful information content:

You don't get 500 words. You get 30 seconds. Forget about disrupting biases - you are a salesperson making a difficult sale with the odds stacked heavily against you. Your goal is to obtain more attention and face time.

Also re-arranged the flow somewhat in the third and fourth sentences, but I think that's iffier:

You don't get 500 words. You get 30 seconds. Forget about disrupting biases - your goal is to obtain more attention and face time. You are a salesperson making a difficult sale with the odds stacked heavily against you.