to be honest, getting the bike of the main stand is easy IF the stand isnt bent, the bracket isnt bent and you are not a 10st weakling.
As said above, stand on the left, left foot in front of the main stand, right hand on the brake lever and rock forwards, if thats too hard , right hand on the grab rail. Push/pull the bike forwards. job done.
My Tiger has a bent stand/bracket so the rear wheel is on the floor when on the main stand meaning a lot more force required to get it off the stand.
Before i was fortunate to find an almost new looking replacement centre stand, the old one had rust holes and was quite twisted so was an absolute bugger to get the bike lifted up onto it. But as mentioned, not being a lightweight certainly helps matters.
I do reckon that sitting on the bike is a far safer way to put the bike down though, as it keeps the bike upright and straight, plus you have total control with both hands and feet, plus the aid of the front brake. Everything about it makes more sense.
I would imagine it's the bike not being totally upright that could cause the stand to twist over time when lowering the bike in the standing position.