That quote is perplexing at best. Having a drg with piercing debuff is clearly visible to anybody that brds/mchs are going to try to pair up with them for dps gains. Another example is the way some buffs work rdm embolden doesn't help other casters in the group it helps physical dps. So of course a rdm is going to try getting in a group that has 3 physical dps for better raid synergy. Just started playing brd/mch and I actively look for groups in pf that have drgs cause quite frankly 15% of my dmg is locked behind them.
Edit- Also the devs are mainly referring to the stigma this community usually blows out of proportion not for coming up with the best raid synergy with the tools we are given.
