Marketing.
If I have a laptop and an internet connection I can work wherever I want. I work hybrid, 2 days at the office, 2 days at home.
It has perks as no commuting time (aka sleep longer, being able to throw in a batch of laundry etc), but downsides are that I like having colleagues. I know a lot of what goes on at other departments because I like to visit them and just chat. You learn so much what they are doing and how that can benefit you, how you can help them, by walking by and having a chat. You do not do that when you work from home.
My entire team does a 50/50 split and I think it is one of the reasons why we don't feel like a team. When people are at the office their days are filled with meetings.
Another downside is private/work life balance. More easily I check my email on off hours.