Because of users. They ask all software to do all kind of wild and unrelated tasks.
Is like you have a workshop to do your job. Then you want to have a bathroom and shower. Ok, so you can wash up at work. Then you want a kitchen, not only a fridge, so you can make fresh meals. Then you ask for some space for exercising, like a mini gym. Also you want a small garden to plant your own vegetables.
They believe everything is related to their primary job so the workshop space should address it and then is when chaos is ensued.
I humbly submit that you've got the right idea but the wrong culprit - it's an endless drive to increase sales that leads to feature creep and bloat being pushed down from on high. Or maybe it's both and we're caught in the middle.
Is like you have a workshop to do your job. Then you want to have a bathroom and shower. Ok, so you can wash up at work. Then you want a kitchen, not only a fridge, so you can make fresh meals. Then you ask for some space for exercising, like a mini gym. Also you want a small garden to plant your own vegetables.
They believe everything is related to their primary job so the workshop space should address it and then is when chaos is ensued.