Imagine a world without the winter cold damage, where spells never fail, you can run for eternity, prices are always advantageous, you can get rid of disease or level drain on a whim, and monsters did not give chase when you flee through a transistion.
Sounds like a paradise, which Barovia is not. Its much better this way, even if everyone will never agree. Achievements matter more when there was something overcome in the process, stumbling blocks, setbacks, these things make finishing a task feel like even more of an accomplishment.
Even the simple task of delivering a crate from Vallaki's warehouses to the Fishing lodge feels like a great quest when the cold is damaging you, and you have to walk because of exhaustion or encumberment. It also makes the hungry wolves attacking even more dangerous. But the feeling of completion is much more satisfiying than it would be if you just got the crate and ran 10 maps without any dangers or conditons.
In a nutshell, whenever I feel systems are becoming bothersome, I just imagine if we did not have them, and i feel bored at the thought.