No one said anything against that. What we are pointing out is how unfair it is that someone who can get direct entry into a tournament would willingly take up the WC place of someone who may want to start their pro career or not have a high enough ranking to enter.
I do take your point, but I can't answer for the consciences of players who do this nor those of the tournament organisers, except to say that it's an unfair world and tennis is no exception. Put it this way, if you were an organiser of a minor tournament desperate to put bums on seats, would you overlook the opportunity of having a top class player participate to boost ticket sales even although it means paying a handsome appearance fee? Basically it's not about money but the reputation of the tournament that's at stake.