I definitely agree with you that not all single liners are spam and that good content can as well be very short. But unfortunately there are many short posts out there getting paid huge amounts without any value (IMO).

Regarding the fact that you get paid on Steemit I disagree that simple sharing of content should be rewarded with high payouts. Only the creation and for sure the honest interaction with content should receive remuneration as Steem isn´t like other social media. It got the potential to be ways better!