It is not an accident when a guitar plays well. How a guitar plays is called the “action”.
Any guitar can be made to play well. You just have to get it into the hands of a tech who knows how to adjust the action properly. In rare cases it does not make financial sense to fix a guitar as the cost of repair may be greater than the value of the instrument.
All string instruments are impacted by changing humidity and will require periodic adjustments.
During cold months, when your furnace kicks on, it heats the air, dries the air and the wood of your instrument which can shift—and in some cases crack. Air conditioning can have the same impact. There are small humidifiers on the market, that fit in your guitar case and protect your instrument from drying.
When you buy an acoustic guitar, you are paying for the sound.
As you increase the price of an acoustic guitar, you get a bigger, fuller, more well-balanced sound. Even an inexpensive guitar can be adjusted to play well. It just won’t have the sound of a more expensive instrument.