Name one guy that has ever done that or is currently doing that.
Jason is right, pool's lore is filled with players who stuck to the action room and were good enough to threaten even the most elite.
It is possible they still exist, but for the most part, that type of player is almost extinct today and desirable action is harder to come by because of the internet and Fargo. Buddy Hall of the late 1970s qualified, as did CJ Wiley of the early 1990s, but once they were no longer getting the desired amount of action, they moved on to tournament play. Strickland was an action player who was a little under the radar in 1980 but was well known by 1981, by which time everyone knew he could keep up with 1979 World Champion Sigel.