No one likes to have his or her character die. No one. But having death as a consequence either for bad luck or bad tactical assertion is what primarily brought these persons to my games.
I am assuming that, when a player in one of your D&D game suffers the death of their PC, they (the player) are allowed to keep playing at the table.Having constant second chances for me equals to handling victory at no permanent costs. A set back? Ok. For how long? At what costs? If none of these set backs have any permanent effects, how can they be set backs? For me they are just minor inconveniences.
How long do they have to wait before they start playing again? Are they allowed to bring a new PC into the same adventuring party? (I am inferring from your posts that the adventuring party is a feature of your D&D games.) Is there a rule that the new PC must be mechanically weaker in some fashion? Or must have a more disadvantageous fictional position than the PC who died?
I'm asking these questions because I'm trying to work out what you see as the difference between a permanent cost and a minor inconvenience.