Not always do we want to assign a solicitor to a donor just because our staff solicited one gift, if so we never actually do so in batch but instead do so through the relationship tab of the constituent record when requested.
When in a hurry it is possible that when entering gift information and tabbing to the new row we may accidentally assign a solicitor to a record without intending to because of the prompt. Being able to turn it off if we're not using it should be an option as it can save precious keystrokes and decrease the chance of assigning a solicitor to a record when it's possible only one gift was solicited.