The thing is, games have gone up in price, because DLCs are just parts of a full game, so if you want to factor in the price of a game, you MUST factor in the price of all the DLCs. If you also factor in game content that is cut to be added into special editions, you are paying a hell of a lot more than $60 to get everything a game has to offer.
On top of that, games are published for less money nowadays because of digital downloading. Publishers don't have to spend as much as they once did for making boxes, physical CDs and paying distribution costs to get them on retail shelves.
Remember when Expansion Packs came out a year or more after a game released, and added a significant amount of content to be worth the money they charged for it?
For example, Warcraft 3 was an incredible game. It had hours upon hours of quality single player story content, on top of a robust multiplayer with a custom game maker which gave birth to the MOBA genre. It was a full game for $60. Then, eventually it had the Frozen Throne expansion pack. It wasn't cut content, it was additional content! Lots of it too! Again, hours upon hours of single player story campaigns, big changes to the multiplayer, more custom game options, etc.
Compare that to Destiny 2. I blew through every bit of content D2 had to offer, except the raid, in 2 days. Then, I hear that there's more content coming! As paid DLC... just a month and a half after release of the PC version. If they are selling you paid DLC less than 3 months from the launch of a game, they are not selling you additional content, they are selling you cut content.
If $60 still bought you everything a game had to offer, you'd have a point, but it doesn't. Most games now are $95 at the least, often more when you factor in limited edition exclusive nonsense.