I have no problem with PPS model/pools.
A person was making a point that it is somehow wrong to use anything but a 0% PPS pool. I was just trying to explain that PPS is just a flat rate payment. A proportional type payment varies from round to round according to how many shares were contributed. There is nothing "wrong" with using either method.
If you have access to a 0% PPS pool then it is "wrong" (as in stupid) to use a proportional pool. Pool hoppers will reduce your share of the reward to less than PPS value. So in the long run (even ignoring the variable payouts) you will earn less. The only reason to avoid PPS pools is if they have a high fee.
In the long run you can't earn more than 0% fee PPS unless you are pool hopping.