I agree with having access,  I HATE crawling under cabinets to do plumbing.

Unfortunately Splint, that is the finished floor.  It will get cleaned and a final top coat after all construction is finished.
I don't get why people do the things they do.  Maybe it saved some money. Contractor said they like the "industrial" look.
Everything has to be scribed to the lumpy concrete floor.

Figuring out how to do something you have never done is what makes a good challenge.