I third those statements. Your personal statement may be your only first chance to show them 'you'. It should show what makes you tick, something that defines you as the person you are today... They know all of the stuff you've done from your experience sections; the personal statement is the only section to connect to them as a person with a unique character.
Why the hell do you want to be a blah blah veterinarian?
It's also an area where you can demonstrate that you understand the industry, social opinions, and current issues in that field. etc
This is not the time to let some company turn it into a cliche, 'mass produced' statement.
Have lots of people read it, make sure it flows, check your grammar, and edit it until you are, or almost are, proud of it.