One of my bikes is a 2010 Honda Shadow RS which has no center stand. The Owner's Manual AND the Factory Shop Manual both state clearly to adjust the chain to "specs", do it with the bike on the on the SIDE STAND.
Earlier post that stated if you put the bike on a lift you change the suspension travel/dimensions is correct. You *could* adjust it on a center stand or lift, but you would need to correct for the additional swing arm angle change.
i.e. the movement limits would NOT be the same as if it were on the SIDE stand.
Lubing a chain with out a center stand or lift is not hard, but it is more of a pain, for sure. I have a bike lift and it is much easier to just sit there, spin the wheel/chain and spray the lube on it, rather than rolling it, spraying, etc.