Also, re:renovations, it all depends to what extent the builder is involved. Ours managed his kitchen subcontractors but we had to do a lot of "PMy shit" because we had to organise the boss builders, the kitchen supplier and then a bunch of randos for other bits like Thames Fucking Water and collection of the old kitchen and checking over the quote and sending unused bits back (Howden's oversupply and then take back the excess).
Well if my customers buy some shit off someone, and it's not what they wanted, they need to sort it out. But that's just fundamentals of shopping, not project management. They could get someone else to do it, but then they need to pay someone.
It's hard for me to say what real PMs do having worked with a bunch that just seemed to send emails back and forth without understanding what was happening or what they were doing. But I'd have thought it's primarily about scheduling the right shit to happen at the right time.
Also, re:renovations, it all depends to what extent the builder is involved. Ours managed his kitchen subcontractors but we had to do a lot of "PMy shit" because we had to organise the boss builders, the kitchen supplier and then a bunch of randos for other bits like Thames Fucking Water and collection of the old kitchen and checking over the quote and sending unused bits back (Howden's oversupply and then take back the excess).