On many challenge tables in a bar full of people, if you lose, you may not get back to the table for a LONG time. So yes, when I play on them I try to win every game. I won 16 games in a row once. It's best if there is only one table in the bar, because then after the players have waited a long time for their turn, you will most likely get as least one game out of them.
What youre saying is absolutely true and I get it but use this example. So you've been on the table for a little while. Next guy up is someone that you have already played and won and you were able to gauge his game pretty good. You can tell he is not a run out player. So back to present game, you break and make a ball. You have a shot a the 1 and you are pretty confident you will be out from there most of the time. So, instead of running out and scaring him and whoever else is watching you just play safe, rattle it, go for a combo on the nine or whatever . Yes there is a risk this guy MIGHT get out but it is a calculated risk and probably 9 out of 10 times this guy run 3,4, or 5 balls, get out of line and miss . So then when it's your turn back at the table and you get out and win. What I am about to say next is totally going to sound like an excuse just trying to validate my viewpoint but it's actually not because SOMETIMES this actually is the case.
So being that often a challenge table is only $5 or $10 action there are gonna be guys that don't mind losing and will continue playing just because they enjoy the action and are having a good time regardless of whether they are winning or losing since it's such a small amount of money. So if you take your foot off the gas a little and don't just straight demolish the guy he will have a much better time and actually enjoy himself. Also along these same lines he may have his girl with himy and if you are just bending this guy over game after game it may be very embarrassing for him with his girl there. Like I said, I know full well how this statement comes across but it actually does have some validity to it.