The only conceivable way to avoid pointers in C is by using indices into arrays, which have the exact same set of problems that pointers do because array indexing and pointer dereferencing are the same thing. If anything array indexing is slightly worse, because the index doesn't carry a type.

Also you're ignoring a whole host of other problems in C. Most notably unions.

People say that "you only need to learn pointers", but that's not a real thing you can do. It's like saying it's easy to write correct brainfuck because the language spec is so small. The exact opposite is true.