"We don't do it that way here."
"We've always done it this way."
"If it ain't broke, don't fix it."
"If it ain't broke, don't fix it."
Like nails on a chalkboard (do those still exist?).
Prior success reinforces the belief that future success will be assured when doing things the same way we have always done them.
It's comfortable. It's easy.
When a company, organization, tribe, marriage, person, whatever-- stops challenging itself and the environment around it, myopia creeps in and decision making is compromised.
Complacency. Denial. Fear.
Change is scary but without it there is no growth.
What are you doing the same way you have always done it? Why?