FP+ was a weird gray area for me. Yes, it's line cutting, but everybody got it so the playing field was still level. Yes, you had to stand in longer standby lines but you for sure got to cut a few lines without paying more to do so.
Time is money in WDW/DL. You could argue all was fair if you were paying the people in the standby line to cut in front of them in the G+ - but you are not, you are paying Disney instead. Do you want to argue that the ticket price has gone down for the people in the standby line because people are buying G+? Oh please - don't even try.
"the impact is the same for the person in the standby line" - huh? That's my point - the impact is MUCH bigger from G+ than the guy breaking the rules. You can't even debate that. That being the case, don't let the rule-breaker ruin your day.
I have an alternate theory, and that is that people do not complain about G+ because THEY want to use it without feeling guilty about it. OK - at least be honest about it.
I am unapologetic about paying for and using G+. I feel zero guilt so there is nothing I need to "be honest about".
You said that you did not mind as much when everyone could use FP when it was free, it is only when we had to pay for it that you felt it was not fair. So, it is not the "line cutting" you have a problem with, it is the fact that it is not free anymore that is the issue. It sounds to me as though you are bitter that people choose to spend their money to spend less time in lines and you do not.
I sum up a lot of things in life using this statement:
"Some people spend time to save money, others spend money to save time."
I spend money at DL to save time, I buy G+ and ILL so that I save my time there. It is a system that Disney put in place and it is a system that I will continue to use as long as the money/time valuation works for me and my family. For me, that money is less valuable than the time.
There are things in my day to day life that I spend time on to save money. I could get dinner delivered every single night if I wanted and save the time I spend prepping, cooking, and cleaning up but I prefer to spend that time rather than that money.
There are other things in my regular life that I choose to spend money to save time. I have a cleaner come here once a week and spend 2 hours cleaning our house. Those 2 hours are more valuable than the money I spend on her so I prefer to spend money rather than time.
But, all that is kinda irrelevant in this debate. This all started about line cutting and whether you believe it or not, buying G+ is not line cutting, at least not to the people who make the rules at
Disneyland.
People who pay for G+ and use it are choosing to spend their money and save their time, all within the boundaries of the system that Disneyland has set.
People who cut in front of others, regardless of if it is a standby line, a lightning lane, a line for food, a line at the front gate, or a line for the restroom, are being selfish and breaking the rules.