Sure, below is a more concise version of the code:

python
'
def string_value(s):
    # Calculate the value of a string by summing up the indices of its characters in the alphabet
    return sum(ord(c) - ord('a') + 1 for c in s.lower())

strings = ['hello', 'world', 'foo', 'bar']

# Sort the list of strings according to the value of each string
sorted_strings = sorted(strings, key=string_value)

print(sorted_strings)
'

This script defines a function string_value that calculates the value of a string by summing up the indices of its characters in the alphabet (using the ord function). The script then sorts a list of strings according to the value of each string, using the sorted function with key=string_value to specify the sorting key. Finally, the script creates a list of strings and sorts it, printing the result.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence