Or you just pay an order of magnitude on hosting, performance consults, bandwidth, etc. etc. etc. And STILL won't EVER get to the same result, because you can't always pay (I'd say almost never) your way into a stable and performant solution. Look at all the others.. Nothing works as well as whatsapp.
Good luck hiring 500 engineers who have no idea what happens throughout the whole stack.
I'd rather pay what you save on cloud providers and snowflakes to them. (not even taking into account the result of these "heroes".. the business value / dominance whatsapp has because of this)
You can hire 1000 people who can't draw, or maybe just a little bit, or you can pay an artist and get the result you'll otherwise never get.