The morale effect might be real for you, but for a large group of workers, their morale has improved since WFH. On my team of 24, only one chooses to work in the office...
Individual morale and team morale are separate. I have no doubt that their individual lives improved a lot (e.g., being able to freely do personal chores), at the expense of team morale (feeling like a part of a team at work).