Uichi was seriously planning on leaving his family who loved him and raised him high and dry without a care in the world. What an ungrateful, cold-hearted, dishonorable boy. Luckily his father was able to talk some sense into him and prevent him from making the biggest mistake of his life.
If there's one thing all wise people know, it's that family is everything.
Look at the people around you who have cut off their families. Do they seem like happy people to you, or do they seem like the kind of people with much higher rates of drug addiction, mental illnesses, criminal convictions, much higher rates of suicide and depression etc.? I think we all know the answer to that.
By contrast families who stick together are on average much happier and healthier.