In some fields and some situations, last-author papers are actually more valuable than first-author papers. A first-author paper tells that you are capable of working as a junior researcher, while a last-author paper is a signal of your success as a senior researcher.

I once had a paper where I shared first authorship with four other people. That implies that the project was large enough that different people were in charge of different subprojects. Which in turn implies that the senior author must have made major contributions by being in charge of the entire project.