That's rubbish. I've heard of delays long before we even had a pandemic.
I see no value in making people go into an office and make each other ill.
My perspective is it was recognised reasonably early on that having key people at home meant occasionally, sometimes fustratingly, the business doesnt flow as it did, people became somewhat remote, unobtainable, things got missed, decisions werent made as quickly. Those lapses do (did) cause problems.
I'm not sure Covid is a relevent excuse now for working from home either. We have worked right through, up to 1000 people a day , theres no social distancing now, all bets are off....we function quite normally, we're not losing people off sick any more than normal.
Youre right re problems pre pandemic, i seem to remember similar.