Because I'm fairly certain (don't have my copy in front of me) that amendment is explicitly referencing due process of law, and you are twisting it out of context. When they say no man may be denied life, liberty or property without due process, they're talking about capital punishment, imprisonment and fines. You can't hang, lock up or fine a man without a trial.
The 14th Ammendment is mainly used to apply the first 10 Amendments to state government as well as federal.
The 14th amendment says, [in part] : "No state shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any state deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws."
I assure you that I am not 'twisting' the words of the 14th. - It was written to stop states from writing unconstitutional law against individuals, & from ignoring the BOR's.
The congressional debates of 1868, prior to ratification, are just a couple of clicks away, & prove my point.