I think the answer is that LG hates you (and the rest of us) and wants your TV to be redundant so you buy a new one.
My preferred option is to buy something like a google chromecast or similar and use them for everything 'smart'. These things work much better for any and all apps than the crappy apps on the 'smart' TV. LG quickly makes their older TVS unusable with bloated software or just no updates - but you can sidestep that with an HDMI device such as chromecast and never use their rubbish software again.