"Cheesing" as it's called, is classic SC2 strategy. People absolutely hate it, but it occasionally works, even though it feels cheap. It's kinda like Blitzkreig in chess...
Like someone else mentioned, early game sc2 is a bit like rock, paper, scissor - scout too early and you'll be behind in economy against someone who's super greedy, but scout early against cheese and you've got a free win. You can take the "conservative" approach which is relatively safe against early cheese while not falling "too far behind" against a greedy opponent, but you'll still be behind in most of the games. If you're the better player though I'd argue it's still better to play conservative, be slightly behind, but win in the late game, while not falling victim of early cheeses.
People keep saying this but it's really not true in current starcraft. You start with 12 probes now, and terran and protoss probe scout 90% of the time at least with their first probe.
Another name for the "Scholar's mate". Quoting wikipedia [1]:
> Scholar's Mate has sometimes also been given other names in English, such as Schoolboy's Mate (which in modern English perhaps better connotes the sense of 'novice' intended by the word Scholar's) and Blitzkrieg (German for "lightning war"), meaning a quick and short engagement (Kidder 1960).
I used to be bitter and hate it with a passion. I realized it has a very important part in the psychology of the game, especially in series. it creates very exciting moments for spectators when used well and helps keep people honest in their openings. If you as a pro never cheese, you will get taken advantage of.
Who hates it? 2017 and 2018 saw a resurgence of aggressive play that resulted in more varied games than ever. Some strategies that were previously considered all-in plays are now standard openers.