I'm glad you question the why, it drives me crazy that this rarely gets mentioned. Nothing against IT - I work in it, too. But I also struggle with "finding meaning" a lot. I don't think I ever saved anybody's life. I suspect for example physicians struggle a lot less with the question if what they do is any use at all (apart from the fighting bureaucracy part). Of course you can do great things with IT, but it's certainly not a given, probably not even the norm.