Who mentioned Sony?
I often take pictures which hit the buffers of MFT dynamic range so I have two choices, let the highlights blow or protect them and boost the shadows and no matter how much love I feel for MFT FF has a clear and real lead here which leads to better pictures. It's a fact and as simple as that. Then there's the quality and luxury of it and that is a factor for enthusiasts and if I didn't feel the love for both the pictures and the kit I'd be doing something else like knitting cardigans. The fact is that FF files are just better than MFT or APS-C files if you're into reveling in that part of it and I see no problem with people liking that aspect of it all.
I grew up with simple cameras and ISO 1600 film and pictures being blown to bits or noisy messes was par for the course but things have moved on and I don't think it's all about snobbery or shallow DoF or laziness or cropping the bejesus out of pictures. It's about getting the end result and the quality you're happy with and in this respect FF possibly represents the high point in the performance to cost stakes before you get to the digital "MF" stuff which is beyond what most are willing to pay and perhaps brings practical and performance issues. I like and use MFT but for the pictures that really matter to me give me FF as long as it's practical and the costs are acceptable.
I just printed a picture out the other day and it's gorgeous and it was taken with a FF camera, my MFT kit could have taken a similar picture but not an identical picture. I do think that MFT is good kit and even I can take decent pictures with it but lets not kid ourselves that FF has two advantages, better image quality when it's required and better image quality when we want it because we want it and I see nothing wrong with wanting it because we just want it and that doesn't take anything away from MFT just like having a Lotus Elise doesn't detract from the list of positives my Hyundai Getz offers.
Anyway, that's my last word on this issue and I've said it because just as you find al the FF talk a bit irritating I find the line that FF isn't needed and leads to laziness a little odd in the context of a photography forum populated largely by enthusiasts. I'm an enthusiast. I spend too much time and money on this and I make no apology for wanting nice prints and pictures that I can look at and think...that's nice