I'm one of those nobodies ;-) A quick search on Youtube will show at least half a dozen Clash Of Clan dedicated channels with more than 100k subscribers (ie Galadon, Chief Pat, Molt, Nickatnyte ...)
The commentary is definitely a big part of the appeal. The strategy, the luck, the skill, the occasional swing at the last moments, and the drama (or metadrama).
I cannot say I like watching every game stream, but certainly watching Starcraft II with people like HuskyStarcraft commentating is pretty entertaining.
Each to their own however...
I love playing video games, but I've never had the patience to seek out and watch other people play. I'd much rather be experiencing it for myself - but as you said, to each their own.
Other games are competitive and require skill, and the way people play them, the tactics and strategies used, and the commentary, that's also interesting to me. Do you think sports (from a 'sport' like poker, to say football) are boring? Or say coding challenges?
I can get behind the idea that you prefer to play yourself, but can you not imagine (any reasons) that also watching games be played to many is not like watching paint dry, at all?