It’s interesting how I agree with most of what was said, and yet you undermine your own points by claiming there’s lots of cheating in MtG.
There’s zero proof of this. Because if there were, it wouldn’t exist.
Deck/Decklist Problems are what you’re thinking about, and it’s frequently a failure to de-sideboard that wouldn’t have gained any advantage in the current matchup. Identifying a stacked deck is notoriously difficult, as anyone who has actually spent time looking at how to randomize effectively would tell you. Judges go to a lot of effort and trouble to make sure everyone is playing fair, and they know common cheats that can be performed and are very good at spotting them.
Now, 10 years ago, what you’re saying would’ve been accurate, because there wasn’t a big system around making sure nothing bad was going on. Now, we have judge conferences and multiple videos describing common cheats and tricks and how to catch them.
Judges are required to check at least 25% of decks present in any tournament. If cheating were so common, we would be finding lots and lots of these errors. They do track them, and they do ban people for ‘happening’ to get the same errors over and over.
Also I think your LoL knowledge is either out of date or stuck in Bronze. (Or maybe Plat, I hear those guys are dicks…) Currently I haven’t had serious problems in a good long time, at least two years. There’s a couple outliers, but mostly they just feed intentionally, get reported, and immediately get feedback saying the report was successful and they banned the offender.
Back to the topic at hand…
This reminds me of WAAC when I played 40k. People will tell you to Win At All Costs, but then there are still some ‘costs’ that are too high. Too many restrictive rules/community guidelines leads to rules lawyers of the variety “Well what I did wasn’t specifically listed, so it was fine!”, so instead using a few rules and a general “Don’t Be A Jerk” rule is usually better.
Mind Games are okay, lying to an event organizer is clearly not. Lying to your opponent is mostly fine, but intentionally prodding/poking them to incense them is not.