I have a screen-less wacom, so no stand with the tablet, but I bought second hand an ilustrator table, one of those you can bend as you please, so I remember to incline it a bit both to draw and write because I can feel the pressure on my wrists and my bad posture.
If I work in bed, I lay down and work with the laptop and tablet on my lap for the same reasons.
So, yeah, I deem it necesary for any device you may be using.