What you say is correct, but Peres has a platform from which to speak and from which he will be heard. He is a statesman unlike the reigning Israeli politicians, and he will not be stifled or silenced. He can't make policy, but he sure can rattle the status quo.
Police disperse hundreds in brawl in Kafr Manda, northern Israel (Haaretz)
from the article: How dare Peres trust Abbas