Ironically, both Excel and Word as graphical products, were honed on the Mac where, at the time, there were no other competitors. Clearly, Judge Penfield thinks so. Still, it's less of an obvious decision than one might think. As I've said over and over, the goal of a company, first and foremost, is to make money. To make money, you need to gain market share, or gain a stable market which is willing to accept progressive and ongoing costs.
Capitalism is remarkably short on selfless altruism.
It's taken many years to learn both. Everything they do is a neatly connected system to cross-sell their own products, and they do not take kindly to people trying to screw that up. There's one thing going after a roughly equal competitor and doing your level best to kill them. That's pretty much the norm in our capitalist economy, and yes, even using some pretty underhanded tricks can be acceptable, but we do have an ethic which says that the smaller competitor deserves a better break. We don't usually sanction going after a fly with a cannon.