Well, this has certain advantages, but only for those who have truly made betting an integral part of their lives. I'm not so passionate about it that I can also make up some tables. Although it may make sense for betting, but only for a long time period.
This is if the person entirely based on gambling for a living and realistically, looking upon making tables to keep tracking record could be a lot of task in my opinion except such person has taken gambling as a full time job without looking for source of money. This type could easily leads to gambling addiction since all attention is being focused on gambling.