It's not wholly binary--maybe 2 scheduled days a week will work for both many of the people who would just as soon mostly work from home and those who want to be in an office with their team. But, in general, yes. A "you can come into an office if you want" policy is probably not going to be very satisfactory for someone who wants a co-located team and much of their team chooses not to come in most days or even live in the same area.

As I've said before, as this shakes out over the next year or two, I suspect a fair number of people who can do so will end up choosing jobs based on remote policies and how companies operate in practice.