Solution is pretty simple:
First, buy a reliable hygrometer if you don't yet have one. Trying to guess what the humidity it is pretty futile. 40-55% RH is the ideal safe zone, though you can probably go a bit higher without much issue. If the guitar is exposed to less than 40% RH for long periods of time, you'll notice the fingerboard will shrink causing the frets to stick out, possibility of cracks developing, etc. The sound will probably change too. Also avoid temperature extremes - don't keep the guitar near windows or in direct sunlight, heating/cooling vents, etc. Rule of thumb - if the temperature feels comfortable for you, then the guitar is probably comfortable as well.
If the room where you keep the guitar on the stand is consistently in the temperature/humidity safe zone, then you have nothing to worry about keeping it on its stand, except of course accidently bumping into the guitar or dropping things on it etc. If the humidity is too low, your best solution is keep the guitar in its case or get a room humidifier that will keep the humidity in the safe zone around the clock. Either solution can be an inconvenience, so its up to you. Personally I have absolutely no problem keeping my guitar in its case and don't see it as an inconvenience at all. It takes literally 5-10 seconds to take it out and put it back in.
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