Say I'm a worker working in different homes/buildings on a daily basis like an HVAC tech or plumber and use doordash to deliver food to the job site. How is tha

Say I'm a worker working in different homes/buildings on a daily basis like an HVAC tech or plumber and use doordash to deliver food to the job site. How is that fraud? Or are they discriminating by time thinking no "legit" work happens door to door after 5pm save for people doing unpopular things?