Jonathan Humble: Question From A Supernumary

I feel a little in the way, a nuisance I suppose;
I'm like a green carbuncle on a supermodel's nose.
A fly found in the ointment, a worm upon a plate,
A banker's contribution to a probity debate.
A vegan at a hog roast, a snake inside a boot,
The water lapping at the feet of mighty King Canute.
A politician's promise, a long forgotten vow,
As useful as a set of wheels and jet pack on a cow.
I feel somewhat superfluous, important I am not,
As vital to the status quo as camels on a yacht;
And so I have a question, asked with due humility,
Within an endless universe, what is the point of me?