It really depends on the individual and their experience. Surely at some point one can be forgiven for wanting to develop further, take on the challenges of command, advance one's career?
Is it so terrible? Maybe the OP is a late-comer to aviation and wants to maximise the return on their training investment. All around us we're being reduced to the lowest possible financial cost. Is it so bad someone has a motive other than the pure, unadulterated love of flying? After all, isn't that the line spouted by so many of the pay-to-play brigade? "I just love flying so much, I'd pay to do it!"
With 6,000 hours, they've probably got through a good number of checks... cut the guy some slack, or bite your tongue with the snide comments.