Honestly I think companies are (mostly) wasting their money porting desktop software to iPads. There's going to be niches where it makes perfect sense, but Office for the iPad is going to be a waste of money. Home users don't need it, business have laptops and desktop for those things, and Word is a poor note taking app of field work. To be fair I believe that the iPad is a poor note taking platform in general.
For specialized software, tailored to specific fields, with only the interaction elements for particular jobs the iPad can be a much better fit than a laptop. Those jobs however aren't generic enough that off shelf software make a ton of sense.
Doesn't really matter what you personally think, what matters is what companies think, because they have the data to back it up. Is it a waste of money or not? Office for iPad came in 2014 and still being quite actively developed so I think we can conclude the opposite of what you are saying.
Seeing that the only way that Microsoft makes money on Office for iPad is by selling O365 subscriptions -- same as Adobe with Creative Cloud -- having access anywhere is the value add.
The Zune was launched in 2006 and discontinued in 2012. Why did that product last 6 years?
I’m not saying Office for iPad is pointless (I use it regularly, so quite the opposite!), but I do think it’s foolish to think an organisation the size of Microsoft’s doesn’t necessarily do things for obvious reasons. Individual incentives do not always lend themselves to data driven objectives.
Not sure about Office, but iPad with Pencil seems popular with creative professionals, so for Adobe not to support it would open up opportunities to other software companies to Innovator's Dilemma them.
For specialized software, tailored to specific fields, with only the interaction elements for particular jobs the iPad can be a much better fit than a laptop. Those jobs however aren't generic enough that off shelf software make a ton of sense.