This is theoretically correct, however, it is also good to consider whether these foods are going to be detrimental to your health.
Many people do eat any or all of these processed foods on a ketogenic diet because they are all high fat and low carb foods. However, most processed foods, meat or otherwise, have lost a lot of the nutrition that the whole food has before it is processed, plus there are a lot of chemical additives that are put into processed foods.
Some also are processed with added sugar, so it is always good to check the ingredient list on the package.
Therefore, if you heath is your primary concern, then avoiding all processed foods is a good plan, or at least keeping the amount that you eat of these foods to a minimum.
Having a little bit of bacon on a Cobb salad is a lot different than having a lot of bacon for breakfast each morning, or with whatever you eat when you break your fast for the day.