Exactly, I just don't understand the grandparent's point, why have a "Postgres person" at all? I hire an engineer who should be able to do it all, no wonder there's been a proliferation of full stack engineers over specialized ones.
And especially having worked in startups, I was expected to do many different things, from fixing infrastructure code one day to writing frontend code the next. If you're in a bigger company, maybe it's understandable to be specialized, but especially if you're at a company with only a few people, you must be willing to do the job, whatever it is.
Because working now at what used to be startup size, not having X Person leads to really bad technical debt problems as that person Handling X was not really skilled enough to be doing so but it was illusion of success. Those technical debt problems are causing us massive issues now and costing the business real money.