Welcome gefgef. Yours is an opinion quite a lot of people share. However, others think there is no categorical distinction that we can make between those examples of business and garden so both forms should be fair game. Is it just what one is raised to recognise, perhaps? And is there any real barrier to comprehension?

Personally although it sounded uncomfortable the first few times I heard it, I now recognise the terms of reference being implied – it’s frequently drawing attention to the fact that there is a meta-business as well as the basic units of trade - and my ear doesn’t ‘stumble’ over it any more.