If you're advocating even all of that should be removed as well, then we're really talking about converting national parks to wilderness areas.
While the point I am addressing here is only about the issue of commercial development I wouldn't have any problem converting them to pure wilderness areas. The entire concept of having a national park be a wilderness area that has little islands of crowded commercial areas with heavy traffic in the middle just seems strange to me and defeats the purpose.
I don’t think having some amenities is a bad thing. Honestly the biggest problem is not their presence in places like Yellowstone or Grand Teton or Olympic or Mount Rainier it’s how poorly some of them are maintained and the sheer quantity of tourists especially in places like Yellowstone which is a UN World Heritage site. At almost every lodge I’ve stayed in in those parks they’ve been dirty and very expensive.