Steamers are great because not only will they log more hours than anyone else can reasonably spend playing a game, but they do it for an audience. Even if that specific steamer doesn't notice and file a bug, chances are that one of the tens of thousands of hawk eyed viewers watching over their shoulder will notice and say something. Hell, if it's a particularly huge (or funny) bug, chances are pretty great that a detailed, pro quality video will be on YouTube in the same day, detailing what it is and how to reproduce it.

This one paragraph covers like 99% of your post, which is weird because I said it before you made that post, so it's almost like you didn't read it.

There are other people who play jusy as much as streamers if not more but they dont get the same treatment

This is literally the only sentence in your jumble ragelogic that wasn't already covered. Let's say there is someone who can support themselves through just playing games on hours that match a pro streamer, but aren't a streamer themselves. Few problems with that:

1) Yes, they have the same hours, but they don't have the added perks of thousands of people worth of redundant bug spotting. One person might miss a bug; 10 thousand people will probably not.

2) If this person has none of the publicity of a streamer, wow would you find such a person to give them an invite?

3) Yes, the publicity is a really nice benefit. Let's say your mystery NEET can log just as many hours as a professional streamer, and has the bug spotting/logging capability of 20 thousand simultaneous viewers, and can somehow accomplish recording and archiving all their footage on their own, but they have none of the audience. They do all this, but nobody knows of them. On the other hand, there's a streamer that has 100% of all these same qualities, but they have the added perk of generating a huge amount of hype. One streamer is between 1 and 20 thousand viewers, all getting excited for the game. Which would you pick?