That's like a teenage "i am very smart" thinking. I mean sure we can look at some string of random bits and say "that looks random" but you can't just generate any old string of random bits to replace it (which would be the only 'pattern' that could be leveraged for compression here). If it's encrypted it'll also appear random, and therefore not be compressible, but you have to encode every byte exactly or the message won't be decryptable.