The article says the mandate is 2 days in the office per week for employees who live within 50 miles of an office. The quoted exec lives farther from an office than that. Everyone can still work remotely 3 days per week.
I can see this possible argument: that having their employees do both in-person and remote work allows them to identify and understand aspects of in-person work that are beneficial and missing from the remote experience, and thereby discover how to improve their product.
I won’t believe that’s why they have an RTO mandate, but I can see it as a post hoc rationalization.