For many of us it isn't, but apparently we are no longer considered valued players by the King empire - our concerns and complaints are ignored, complaints hushed up and moved to a very long thread of similar comments.
Turning it round "Why landscape is better than portrait?"
# as a tablet user, there is no holding the device in an un-natural position - leading to lower rates of RSI and PAIN.
# as a tablet user, the power cable is to the side, not digging into my stomach, or sticking out of the top, pulling the top of the device down and making it feel heavier (see above re RSI), & not bending at an awkward angle - leading to greater longevity for both cable and cable port (and therefore device)
# as a PC user, the playing area is larger making it bigger and easier to see - so someone with visual accessible issues has a better chance of seeing the game.
# as a PC user, the playing are FITS the screen so less scrolling up and down to see the boosters and number of lives left while trying to play the screen.
# as a phone user, the playing area is larger, filling the screen and the candies themselves are BIGGER * making playing with fat fingers a slightly more enjoyable experience (* well they seemed bigger last time I played on the phone - landscape was a much more natural and enjoyable experience)
etc
I am sure there are more ...
Feel free to add your own (or if you think portrait is better than landscape add some counter arguments - anything except "the designers** say so"
**As a former software developer I am very aware that the actual coders/developers often have little say in the actual design, it will be some 'big boss' who 'had an idea' (changing to unreadable fonts on a product I once worked on was one), or bean counter ('we have to use this framework - its cheaper', plus 'if we don't have lots of options we don't have to test them, so cheaper' - win win - for the share holders and top bosses - not so much for the end user or PAYING CUSTOMER)