For many - it’s not a slow death - it’s a rather quick suicide. Witness how many posters come onto a forum - start posting plays like mad only to disappear after a small losing streak.
For others - suicide should be on the table - never manage to win enough and always manage to lose at end of month/season/year.
Only 2 sure fire ways to make money in this industry and you got to be good to make it doing either - your either playing the book and dealing with bettors coming to you or your working every bonus/arb opportunity and have the bankroll to do it.
If you’re solely picking winners - you have to find a bookmaker who isn’t good at their job or have multiple outs to do it long term - unless that bookmaker is following and laying your action plus off - no one can support funding a winner long term.