If a person owns n accounts, that person got n times the initial steem-power for free, and using self (in the personal sense, not only in the individual account sense, that person growth his steem-power and/or SBDs n times faster, and this comes at the expense of the rest of the users, since SBDs and Steem are both created by inflation.
It might also means n times the amount of work for that person, had it not been for the use of bots, which exempts from this trouble.
Bots often also lower the level of discussion, waste space on the blockchain and wastes bandwidth and encourages others to implement as well, since otherwise they are at a disadvantage.
There are also some neutral and needed, or at least potentially needed bots which I would not have eliminated, even if I had the ability to do so.
So I am not completely opposed to bots, but if nothing will be done against the partisan bots, the place may gradually deteriorate to a game of life cyber bots version.
Bots also make this environment more inflationary in a way that discriminates against human users.
https://en.wikipedia.org/wiki/Sybil_attack
https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life