Mr. Longbottom would not be able to inherit the Longbottom family’s wealth either.
He could only be the acting head and manage the family, even if he was competent.
When Laurence became an adult and returned with the family head’s seal and totem, Mr. Longbottom would be forced to hand over his position to Laurence.
The Longbottom’s forces and connection would only be loyal to Laurence as well.
Therefore, Mr. Longbottom had to get the seal and totem and kill Laurence before he turned olde