I bought premium years ago as part of Google Music family (pre yt-music) and stuck with it, it was affordable. I am more than capable of blocking the ads over the years. Other members of my family want to use YT without ads on a myriad of devices. When the price got hiked at the start of the year I was really annoyed, and probably would have dropped the service if it were just me. However my family made it pretty clear that they did not want to jump through the hoops of blocking the ads.
Steam Deck is not available in all regions and grey imports can be a hassle, for some people this is the safer road