I don't mind it going down to nothing. Something like a Big Muff always has a minimum gain resistor to stop that happening but in reality it's just acting like a preamp volume control and I quite like the fact that you can go down quite low in the "preamp" stage and boost it with the final volume pot.
But mostly the reason I don't mind them is I'm never too far away from maximum anyway, so what's happening at the other end doesn't concern me too much
Although I will say a minimum resistor can be useful with some pedals that are good sounding at both high and low gain levels, simply because if you use a minimum resistor to set it to the lowest gain that is useful for you, then you have a lot greater resolution throughout the pots rotation of good usable gain settings. For one trick ponies it doesn't bother me so much