We don't drink the hot water, but have never, ever heard that it's not safe to drink. I would think if that were the case, there would be warning labels all over the place. The anode is to take care of the electrolysis, so if you have an electric WH at home, you're using water that's been in contact with an anode. Not sure that's accurate information.
My guess is that the whole water system needs to be sanitized with bleach....if you don't already know how to do that, do a search here but it's a quick, easy job. A bit of bleach and a little time running through, sitting for a bit, flushing again and you're done. The other thing that comes to mind, and we've never done this but understand it gets you some excellent results, is to use a WH rinse wand. About $8 on Amazon or check Camping World. A recent thread on this said you'd be surprised how much crud comes out of the inside of the tank. Would think that might help and also make the tank last longer. On our list.
We're not bottled water folks simply because we don't like the disposal/landfill issues with the bottles. We have a faucet mount PUR water filter on our kitchen faucet and it makes all the difference in the world. The filter + 3 additional cartridges at Sam's was about $40. A box of 4 replacement cartridges is about the same. We get a full season - usually - out of 1 box of refills. We try to live green as much as we can and this eliminates a lot of bottles in the landfill that will be there almost forever.