Some DLC has gotten really pricey, like Smash's being $80 total. Some games have terrible microtransactions that harm the game. However, if a game sells at $60 and has $25 in DLC I don't think that should be a bad thing.

1. If you only want to spend $60, you can just not buy the DLC. I can understand if the DLC is very obviously something they removed from the base game to charge extra for, but if it's something they worked on after release then I don't see why they're doing something bad by charging extra for it.
2. Games are far more expensive to make nowadays than they used to be, but sales prices have stayed about the same, not even really keeping up with inflation. The market has grown, yes, but with that there is more competition. If a studio wants to keep making bigger and bigger games (the dream) at a AAA level, then $60 per copy (minus distributor cuts, taxes, etc) is not enough to continue growth as a company.
3. Gamers are very protective of their $60 price point. A lot of gamers say they simply will not buy a game until it goes on sale if it's higher than $60. If developers raise their prices, their sales WILL drop even if you prefer a full package.

The solution to all of this is simple... DLC. If you can take an already completed product and make new content for it, then charge for that, you're making money off something that requires less work than creating a whole new game and most customers are happy because they're getting more content. The key is to charge fairly or your customers will feel like you're greedy.