Why do anything? Why should Intel care about mobile or Nvidia care about compute? Why should apple care about phones and why should Google care about cars and email? Why should Amazon care about cloud storage? Why should Microsoft care about Linux? Why should BMW care about electric cars? Why should Toyota care about hybrids?
Because you can as and because there are big rewards for doing it right and you're in a good position to that.
"Because you can" is the easiest answer you can give to anything. My comment was written because I feel like people say that Atlassian MUST expand beyond developers. So it doesn't feel like they WANT or they CAN.
Because their shareholders expect the biggest return for their money. This isn't a problem for self-funded companies (they don't have to live beyond their means if they don't need to), but if investors don't see growth they'll sell shares while it's still at its peak. That's business for you.
Yeah, the insatiable need for growth is definitely a function of the way we've structured the investment markets. Public companies depend on shareholders for capital. Shareholders buy your shares because they think you're going to be worth more money some day. Generally, companies become worth more money by increasing sales and developing new, diversified assets and product portfolios.
Because you can as and because there are big rewards for doing it right and you're in a good position to that.