I doubt Einstein cared what was on his business card, but I'm sure he cared very much about being in the right career position to do the work that interested him, and to have the ability to influence his work and others.
I dont want to nitpick, but some of his most influential work - dubbed the "annus mirabilis" papers / "amazing year" [0] - was done while he was an assistant examiner at the patent office in Bern. Definitely not a position he was aiming for, but still, a highly productive time.
Typically job titles as noted in that post accompany some varying level of responsibility and leadership. If this is simply about what title is on your card then OK, sure. But in my experience, many (not all) are seeking the autonomy and influence behind those titles. Einstein had titles too, but it was the influence and work behind those titles he wanted. It's the same for many "careerists", a term I do not like.
I think you're losing sight of the original argument I was responding to: that a main reason for spinning off bits of Google as separate Alphabet subsidiaries was to allow job title inflation for the same role.
There's only one CEO per company, so if you want more CEOs you need more companies. Being CEO of Waymo probably isn't that different from being Manager of the Autonomous Cars Division or whatever, but it sounds more impressive.
- [0]: https://en.wikipedia.org/wiki/Annus_Mirabilis_papers