Sims do not do herbalism during a herbalism hobby class

I tried to make a herbalism themed small business using the Businesses and Hobbies Expansion Pack. I thought this would be very useful for future gameplay since the herbalism skill is one of the hardest skills to complete due to the amount of time and money you need to spend in Granite Falls to collect the plants and insects. The first issue I encountered is that there is no option for a 'brew herbalism remedy' business activity and the small business attendees do not use the stove or grill during the classes even though three stoves and grills are required on the lot to hold a herbalism lecture. The result is that the only activity available is to 'attend class or lecture' and the customers do not do any herbalism during the classes.

I would like to see that a 'brew herbalism remedies' is added to activities in small businesses and in Get Together's clubs; and that the sims will use the stoves to participate in the hobby class.