Different people find different things exciting/sexy to differing degrees. Some people like building stuff that others can see. Some people like building stuff that others will use. Some people like building stuff that makes other people build stuff faster. Some people like building stuff that is highly reliable, really fast, really scalable, or really efficient. Some people even find improving advertising really exciting - they expound on how ads can be win-win, and even that they can only find their full effectiveness when they are, or something like that.

I don't think anyone is "avoiding" any work - there's just tons of work that needs to get done, and people mostly choose to work on that stuff that interests them. One could say that product engineers "avoid" infrastructure work and infrastructure engineers "avoid" product, but I think that would be inaccurate in most cases.