ummm, I have no objection to people working from their own homes in any capacity as long as they abide by the rules.
I don't think every home is infested with vermin but I don't believe that every person has proper knowledge of food safety in a business capacity, from safe storage to labelling.
The majority of tea rooms, greasy spoons, restaurants, take aways, delis, pubs that sell food etc in my area have continued to operate despite lock down as take away/delivery only. It is not right that they should face the additional challenges of increased competition from unregulated new businesses that can undercut them because they are not paying for the required insurance and are not declaring their income to the taxman. Anyone can apply to be register their home food business - the penalties can be huge if they don't.
https://www.gov.uk/food-business-registration
Competition is great for the customer - more choice, helps keeps prices down but it should be on a level playing field.