Back in my uni days I did a stint over the summer in a hotel kitchen. You’re absolutely right in the fact that washing up (equipment) and washing down (walls, floors, sinks etc) is an essential part of the day, so much so that people (like me) were employed to do just that! Splashed food, if not washed off, will breed bacteria. We all know this. It’s why kitchen staff also wear uniforms and hair nets/hats plus shoes that are only worn on the kitchen so as not to cross contaminate. And this was long before Covid which has just stepped hygiene practices up by about a thousand percent. Most of us have healthy enough immune systems that we can fight off bugs without even knowing we’ve ingested them, but obviously with food there’s a real risk of salmonella and e-coli if it’s not handled, prepared and stored properly.