Regardless of difficulty settings, people should be able to play the game however they want to play, as long as it's not hurting others. That's why games like Minecraft have succeeded, they've offered various different ways to play the game and they've given you the ability to forge your own path. What's determined as cheesing is up to you, as you can just opt not to use that specific strategy. Complaining about players using a certain strategy, frankly, is goddamn ridiculous. It doesn't affect you at all, why would you complain about it?
That sentiment however doesn't translate well when we're talking about difficulty settings. When developing games, you have (or should have) one goal in mind-- to make the game as fun as possible. Difficulty, a lot of the time, is part of a games identity, like Dark Souls, Sekiro, and yes, Don't Starve/Together. It's a decision the devs have to make, as the direction of the game is entirely up to them. Don't Starve and its various expansions rely on a learning curve, like most rouge-likes. Success is only achieved through trial and error, at least in the devs eyes. It's up to them whether they think adding an easy mode would benefit the game in any way.