many of these incidents are occuring very early after one receives his/her PPL
It's a busy time during which you make lots of mistakes for the first time. When you start making the same ones later on, you've seen them before, and take preventive action earlier.
Two of my cock-ups came during the first 10 hours after PPL. I'd decided I was only going to fly solo during this time, and I'm glad that I did. Looking after passengers adds a bit of extra workload which may not be a good thing.
By the way, a word from the wise - don't overestimate the pulling power of a spamcan. "Come fly with me" raises expectations of a quick trip in a Learjet to Cannes, for lunch. Not half an hour bouncing around in a Cessna that smells slightly of sick, followed by an all-day-breakfast at a run-down airfield in the middle of nowhere. Trust me on this one!