Yeah, you catch more flies with honey than vinegar. These individuals annoying people over stuff like this is like trying to criticize a smoker until they quit.
They know open source or free software is supposed to be better for you but there are legitimate reasons to keep using the propertary software.
Also I have no issue with proprietary software so long as they provide a quality service and respect my privacy/rights as a customer. Given an opportunity to pay for good software I always try to, even if the only option is to donate.
Also if you have a fairly big community having a professional team to handle any issues you have in a timely and professional manner is pretty important. I can't tell you how many times I tried to report a bug that makes the software unusable and the maintainer says "huh, what are you talking about." and ghosts me.