You're white knighting. I hate to use that term, but you're irrationally defending something and citing blatant misinformation to do it. You're letting bias and ignorance shape your perception of what is acceptable.
1) No, other dev teams are not silent. WoW devs literally post almost daily about class changes, systems changes, etc. They even have Q&As (that still suck, but suck considerably less than SE's softball garbage) fairly frequently. Did you even verify that claim before making it? Blizz runs into technical problems like anyone else. They also clearly articulate when they are a problem (they've shared the digit stuff before, as well as issues with the backpack inventory and many other technical woes they've encountered). They've talked about technical troubles with loot, CRZ, and many others. Instead of frequently citing it as an excuse though, they fix it. Give credit where credit is due.
2) I can go even further. B&S has Johnathan Lien, the producer frequently answering players tweets as well as doing Q&A's fairly frequently. You can argue he isn't a dev (because technically he isn't Korea has the devs), but he like Yoshi is the face of the game in the west. Hell, they're even porting the ENTIRE GAME over to UE4 because UE3 was holding the game back due to feedback in the west and the back and forth between the producer and the community.
3) Even the awfulness that Bless Online is has Dev's constantly engaging the community (despite being miserable at it). These are just the ones I personally know about off the top of my head. I'm almost positive there are more.
See above - this is also false. They admit to stuff like this all the time.There are features in WoW that didn't make it to the game until after several years of players asking. The game even has a history of getting ahead of its own engine. The end boss of one of the expansions had several phases with separate hp pools because the combined hp pool literally could not exist in the game. With all their resources and experience they still clearly experience limitations like SE do, the difference is they rarely openly admit it.