Interesting perspective and I think partly true.
As a kid from the age of 2, I rarely saw my Dad - once / twice a year, it was just what normal looked like to me, knowing him as I do now, he would never have coped with me and I'd have been very unhappy. I have huge respect for my Mum as a role model - she always worked as a single Mum and managed to do a good job with me (so my DW says!).
I split with my exDW when our kids where 5 & 7, I'd been focussed on my career and like a lot of career Dad's had left the heavy lifting up to my SAHM exDW.
When we split, she thought I wouldn't be able to cope with the kids and my career so made a plan for me to have the nearly 50/50 (not quite 50/50 as she wanted the £ that came with primary carer status), she wanted to set me up to fail and told a mutual friend as much.
Anyway, I went with it as I wanted a relationship with my kids and agreed for me to have them 43% of the time.
She made it very hard with pick ups / drops offs for the first 3 years - always messing me around on timings / locations etc. A lot of Dad's may have just given up then and blamed Mum?
I found it very hard to focus 100% on the kids during my time with them to start with - I had to dig deep and really make an effort, I didn’t have a clue TBH. I cut down on my work hours and moved to a WFH role so I could make it happen and do school runs / clubs etc.
Fast forward 7 years, I still get abusive drunk messages from my exDW saying she will tell the kids what a cunt I am, but they know who I am, and as young teens, they can make their own mind up about me. We have great banter / fun / conversations together, and I'm so glad I put the hard work in (please take note any absent Dad's that maybe reading).
To answer the original question - a lot of Dad's take least line of resistance and frankly don't want to put the effort in.