I think I agree with you, but I can also see a couple of almost legitimate reasons to allow an author to frontpage their nodes.
Consider Audio and Perl, which I posted a while ago, it received no responses. I plan to post a follow up after some tests. Chances are nobody will see this, and it won't receive any input if I leave the node where it is. However, if I frontpage it after posting my tests, others will notice it, comment on it, and perhaps even learn something from it. Doesn't seem that bad does it?
A different approach could be to require 3 votes or so to frontpage a post, similar to the current consideration feature (add a vote fp to frontpage option perhaps). Just some random thoughts :).