Strength is not a factor in using a centre stand. I say this because I have no physical strength whatsoever and I always use them on every bike that has them. I don't even think about it, so this explanation will kinda suck, but the centre stand itself acts as a lever - all you really have to worry about is both sides of the centre stand touching down (bike is perpendicular to the ground). Any problems you could have with a centre stand will come from using it on ground that is not level.
P.S. Or wacky hijinx from a previous owner - for example, flipping over the eccentric chain adjusters on a Kawi. Sometimes the rear wheel will then still touch the ground even ON the centre stand.