Time is money. Wasting time is wasting money.
A company would lose their minds if they found out their employees were 'wasting time'.
For example in retail, you have to do cases per hour (55 an hour as an example), the company would lose their shit if they found out the employs were fixing the shelf so product can properly go up instead of just putting the product up. They don't want it done RIGHT, they want it done FAST.
In the US, productivity is KEY to all things (which I think is the problematic flaw for us overall), we been brainwashed in "always being productive"
So wasting MY time in a 40 minute game praying on victory rather than FF at five to get into another game is a waste of time and resources.
Some of us live tight schedules and rather win/lose quick games instead of a dragged match where time is short.
TL:DR: Waste my time on an up hill match is taking up my fun time
EDIT: ADDED:
And I mean in games in general, not particularly ranked. I could care less about Ranked/LP, let the wanna be try hards have it.