Simply. Buttons make life difficult for everyone.
They are inconvenient in the morning when you're waking up and getting dressed. And they're a pain the laundry too.
For most of us buttons are just an inconvenience we can now do without.
For others buttons make getting dressed in something that looks nice impossible to do themselves.
One man we know with Parkinson's Disease takes thirty minutes to do up his shirt cuff buttons. 30 Minutes!
Thirty minutes extra added to his day just so he can wear a regular button down shirt like he always has and look nice. But he simply can't get his shirt back off without assistance.