Not necessarily true, you just have to be a bit imaginative in how you kit out the T10D.
It is quite feasible to kit out the T10D for general PvE combat BUT you will almost certainly find that you will have to use different weapons and tactics than you would for an Anaconda.
Personally, I find the Anaconda somewhat lacking for PvE combat due to weapon convergence and firing arc issues BUT the Corvette on the other hand is far superior than the Anaconda for PvE combat IMO. I know some swear by the Anaconda and say the Corvette is comparatively useless, or even swear by the Cutter claiming the other two are useless. I have not flown the T10D much but from my initial test flights I can tell that it can be deadly in the right hands with the right load-out of weapons and other kit.
While the Class 6 Power Distributor may seem to be a limiting factor I do not think it is as problematic as some of the spreadsheet warriors in these forums like to make out.
Any reasonable ship in the right hands with the right load out and kit is going to be a deadly machine. But for us lesser mortals, combat that involves other humans or human NPC's is likely to turn out badly. Now for the Aces out there, go for it. You can turn that thing into a pocket destroyer.