A wise person said “Often, our actions and assumptions continue long after the reasons for them have passed.” That is why picking up things and doing them because others have always done and continue to do them that way is never a good idea.
Any person who desires to be a great success and be a leader both to themselves and to others must not take anything for granted. Stephen Covey said “we simply assume that the way we see things is the way they really are or the way they should be. And our attitudes and behaviours grow out of these assumptions.”
Your assumptions can influence your attitudes and behaviours in a big way and so ultimately influence your future. It is always necessary in any given circumstance to ask the question “why?” before doing or not doing anything.