Please understand, this is a senario based on all other things being equal. Assume NOBODY in the game had any details on prestige classes until around 5th level, and no skills ranks had been spent by any player in anticipation of a prestige class.
Given that senario, what the "I say no" folks are essentially saying (if they offer no other alternative) is "It makes no sense for character development or role playing, and I know you just found out about this prestige class that requires skills you don't have, but if you want to get to use this new prestige class in a reasonable period of time, you need to take a level of rogue".
And what are they saying to those who want to qualify for a new prestige class that has requirements based on Base Attack Bonus and saves? Go ahead, you get that class earlier, out of random luck.
Does that really make more sense than skill loans, changing prestige class requirements around, or swapping skill points? Is it really more important in your game to follow all rules exactly, at the expense of character development, role playing (and let's face it, at the expense of some amount of fun), just to follow the rules?