postgresql: update multiple values within one jsonb object

I have been facing a problem recently regarding JSONB data type in my Postgresql DB.

I have a rather complex structure of my column (let's say the table is called RATING and the column name FOOD_VALUE - making it up) which goes, for example, as follows:

{
  "food": {
            "type": {
                     "id": 1,
                      "name": "good"
                    },
            "category": {
                          "id": 2,
                          "name": "Vegetables"
                       },
            "others": {
                       "descr": "It's all good"
                     }
         }
}

This is an example, the actual one might have up to hundreds of values (nested of course).

I want to update several values (in this example two -> food.type.name + food.category.id) without modifying the structure itself.

This is the desired output:

{
  "food": {
            "type": {
                     "id": 1,
                      "name": "not bad"
                    },
            "category": {
                          "id": 1,
                          "name": "Vegetables"
                       },
            "others": {
                       "descr": "It's all good"
                     }
         }
}

With JSONB_SET I can only manipulate one record within the same column -> RATING.FOOD_VALUE ... I know I can nest them as well, but considering I need to update 40+ values, this might become a hell to read (and therefore maintain)

So this:

UPDATE rating 
SET food_value = jsonb_set(
      jsonb_set(food_value,'{food, type, name}', '"not bad"')::jsonb
      ,'{food, category, id}','"1"'::jsonb)
WHERE ....

is definitely a no-go ..

Another way of achieving this is to use JSON_BUILD_OBJECT:

UPDATE rating 
SET food_value = food_value 
   || jsonb_build_object('food', jsonb_build_object('type', jsonb_build_object('name', 'not bad')))
   || jsonb_build_object('food', jsonb_build_object('category', jsonb_build_object('id', 1)))
   ... and so on
WHERE ....

This looks a bit more promising when it comes to maintenance, readability, etc.. but the problem I faced here is that it changes the structure of the JSON files format :( so the query above will result in

{
  "food": {
            "type": {
                      "name": "not bad"
                    },
            "category": {
                          "id": 1
                       }
         }
}

Any idea how to get out of this predicament? I need to find a way how to update dozens of fields inside a complex JSON structure without modification of the structure itself (just values)