Also there’s several comments balking at the idea of a baby regularly being put down to nap in a cot in a dark room....
Some babies just need this. My DS cannot handle too much stimulation when trying to sleep. He stopped napping on me by 10 weeks. He never fell asleep in the car seat unless he had literally cried himself into exhaustion. He hated napping in the pram. He would physically fight to get out of a sling by 5 months.
Yet he would nap beautifully in his cot, in the dark. He settled himself. If I tried to shush and pat him, I just disturbed him.
It took me months to figure out that all the rocking, patting, buggy walks etc did not work for him. I didn’t work out until he was over 1 year that I could get him to nap in a buggy - but I had to park him in a quiet corner for 5-10 mins and NOT move.
He was obviously unusual as most babies like movement, but not him. Even now, as a toddler, he has literally NEVER fallen asleep on the sofa or at the dinner table etc. He just can’t.
Yes, having to prioritise his need to be home for his big nap was restrictive, but he needed it. The alternative was to drag him around crying and exhausted. On the plus side, when winter came, we were home and warm while other friends babies would only nap in moving prams so they were stuck going for long, cold, wet walks to get their kids to sleep.
It’s just what suits your baby. People will judge, depending on their own experience and what worked for them and might think you’re doing it all “wrong”, but just do what works best for your baby. After all, you’re the one who’ll have to deal with the overtired or hungry baby later!