I really wish developer's wouldn't like about the hit chances or obfuscate. Gets real old in X-Com.
The issue is that if you give the player real hit rates, they start complaining about the hit rates being rigged. Heck, it still happens when the game gives the player small bonuses (check out the XCOM OT's). If you're concerned that the game is being made too easy for you, XCOM 2 has mods that can disable that completely. The highest difficulty setting also gets rid of the small bonuses you get on lower difficulties. If you think that the game is cheating against you and making the game harder, well, that doesn't actually happen.
To reiterate, the modern XCOM games do cheat in your favor on hit rolls on difficulty levels below the highest. They never cheat against on hit rolls. (Enemy patrols, however, are a different story)