I think you've got it backwards.|
High acid foods like tomatoes do not require pressure canning. Water bath is sufficient. The only time you would need pressure canner for tomatoes would be something like spaghetti sauce with meat in it.
Low acid foods and meats need to be pressure canned.
Some people are like a slinky. They're not really good for anything, but they can still bring a smile to your face if you push them down a flight of stairs.