I think some jobs are like that definitely. Heavy workload, helplines etc
Some people think all WFH should be like this and get horrified because someone hung some washing out or helped out a family member for a short time. Plenty of jobs have flexibility and it is about getting the job done not just being present in front of the computer non stop.
I get all my life admin done throughout the day around work. I do an exercise class most mornings and then start work later on the days I WFH. I will meet up with friends, work on my side business. Nobody cares at my work. All targets are met consistently.
Is it jealousy that people get so upset?