It's easy to say violence isn't the answer, but then what are you supposed to do when the police doesn't do anything? Uke is quite naive in saying this but not proposing any other solution. Laying low doesn't really mean anything. I've seen gangs kicking people out of their houses simply because their houses were at strategical points to them. Usually it's easier leaving the place than trying to go against these gangs, which is still very hard emotionally wise. The most the seme could do is support another yakuza branch to beat the current one in power, striking a deal with them as a neighbor clan. But it's not like this would be a 100% no violence solution, just a more a quicker and more stable one.