It's not luck, it's connecting with people and spreading the word out. I got my job by going to cons and having a booth; some dudes aka my current bosses saw my shit while they were going to their division, we exchanged contact info, a few months later I'm working at a dream job.
Alternatively, my friend had their work shown to company owners by people who also worked for said company, and was hired.
And recently you're seeing a lot more instances of artwork spread around the internet and seen by big companies that have people getting hired out of nowhere. It's not luck so much as how much you promote yourself. If you don't do any of that work, you aren't going to get anywhere. Which is why furry artists are stuck in their own world because it never truly reaches the outside, the real world.
Nepotism occurs when a company wants an internal house style for their works. For example, like Patrick Lee in Dreamwave. Let's just say it didn't end well for Dreamwave.
A company isn't going to risk shitty artwork being driven on their platform just because the boss wants his son to have a job.