Is the hit and run strategy considered bad etiquette?

[polyviewness]

I was playing 5/10 pot limit omaha the other day where i won a 1.2k pot after putting all my money on the flop and beating my opponent with a higher two pair. After winning the pot i quickly sat out, then the guy started berating me and saying that it was bad etuiqette to use the hit n run tactic, i was just wondering if this is true or not?

Isnt that the whole point of cash games, to make a profit and leave while your up?