This is the kind of thing that gets tech people a bad reputation. YOU don't need Excel. I don't need excel - but that guy? You have no idea what he needs and if the people he's supporting need (or just want) Excel to get their jobs done it is incredibly arrogant to tell him what he does or doesn't need.
Now, I've loathed Microsoft since the 90s, but that makes me a weird and special little petal - it doesn't count for squat in business.