Because it’s true.
Nowhere was a specific timeframe stated, just that decent tanks will be pickier because why shouldn’t they?
Idk, maybe you do have some experience. If you’re starting low on gear and no rating to show for it’s generally hard to find groups. It’s not fearmongering it’s just the truth. If all you’re doing is 10s you can get low quality tanks anyway, they’ll be fine for low keys.
That’s cool, the statement is still true. People who can afford to be picky are going to be picky. Whilst there will always be some charity cases out there it’s not really the norm.