This is so common, sadly. I've seen this happen a lot. And those geniuses advocating for these insane infrastructure usually leave the company after they scratched their itch with kubernetes or whatever they were interested in playing with I'm s strong believer that your first few engineers are very very, very important and you need to hire very experienced people.

In the cases I've seen this, honestly I think the ones to blame where the stakeholders, for hiring very young people, for the cheapest rate they could and giving them full responsibility and the Senior Architecure Something Something title when those people don't have more than a couple years experience and are just building what they read in a blog two weeks ago.