⭐ Merited by DaveF (2)
Mining is not what that should be regarded as a hobby. Or I can not consider it as a hobby. The reason for this is because I do not think someone will say he is mining bitcoin for pleasure. Hobbies are activities that you do for pleasure. Even if some people just like to be a miner and not benefiting from it, it is still not a hobby for such person because no pleasure derived from not benefiting from being a miner.
You made some valid points, but some users actually enjoy tweaking [overclocking and in certain cases, even underclocking a few things] their rigs just for the sake of getting the most hashrate while keeping it in a stable condition. There are also a few who enjoy modifying the appearance of their mining rigs and they constantly do this for fun, so these things are visually pleasing.I would not consider it a hobby as it takes a lot of efforts at first to setup and then to maintain the Bitcoin Mining Farm.
There's no need to go that big when you can have fun with a single mining rig 