//...but for those can work from home I don't see a problem not rushing back to the office.//
Well I do:
Try contacting almost any organisation. Their first response (if you manage to get through at all, that is) will be "Because of Covid, many of our colleagues are working from home. This means we cannot provide the level of service we normally would..." (or similar). The DVLA is all but defunct for anything other than online applications (many processes cannot be conducted online). Many large organisations are providing what can only be described as third rate service. Companies have had almost eighteen months to sort themselves out. Many are simply carrying on providing shoddy service "because of Covid".
It is now clear (and accepted by many employers) that the career progression of many of their people (especially the younger ones) is being severely compromised by more than a year of working from a stool at their kitchen worktop with their laptop propped up against the toaster. They are not getting the coaching and development they need which they would when in an office surrounded by more experienced colleagues from whom they can learn.
Add to that the devastating effect WFH has had on town and city centres who have seen their retail and hospitality sectors decimated.
//" And it seems now people are refusing to go back to work,"
Who are these "people" and what is your source of such a claim?//
Here’s some:
https://www.bbc.com/worklife/article/20210618-the-workers-pushing-back-on-the-return-to-the-office
And some more:
https://www.thehrdirector.com/business-news/the-workplace/half-are-reluctant-to-return-to-the-office-2/
And a study on the issue:
https://www.icaew.com/insights/viewpoints-on-the-news/2021/mar-2021/uk-employees-most-reluctant-to-return-to-the-office
And an HR viewpoint:
https://www.hrmagazine.co.uk/content/news/lockdown-savings-make-workers-reluctant-to-return-to-the-office
For most businesses WFH is a short term expedient, not a satisfactory long term strategy. It may suit some employees; some employers may be able to accommodate it without jeopardising their business too much. But overall it is disastrous, not only for the reasons I have pointed out but many more. It needs to be ended forthwith.