We have experience of both.
Child number 1 was an August baby, liked reception, we pulled her out in yr 1 as she was so unhappy and anxious. She opted to go back in yr 4, after 3 very happy years of home ed.
Child 2 started school about half way through yr 2, when a space became available at our school once #1 went back.
Child 3 did preschool etc, straight into reception, now in yr 2.
We have had our qualms about mass education, it can't be everything to everyone. But a nice primary school is a nice place to be. Our local school is a small, single form entry village school, with a forest school etc. A lovely set up. Yes, do SATS etc but very chilled. When we chose it we felt that as long as the pastoral side was good, we could always bolster the academics at home...if they feel safe and happy at school, like they belong, then that's half the battle. It always felt like this school really saw our kids, and got them for who they are.
The oldest 2.are at high school now, which they tolerate, but are doing well. Many high schools are quite big, noisy places which don't seem to really like teenagers very much, which is a shame. We have been very careful to make sure that they have passions outside of school, which helps.
We don't regret home edding at all, it was a lovely period of our life that we would repeat if we felt it was better for the kids and family. We are in an area with a strong home ed community etc, which helped. It's quite common now so wouldn't have the same level of 🤔 as when we did it however many years ago.
That said, I wouldn't write off a school based education. Have a look round a few, with an open mind. My feeling is that if you go in thinking the thoughts you shared at the beginning of the thread you will subconsciously be looking for evidence to reinforce that, I did come across a lot of that in the home ed community. A nice primary school is a fun, engaging place to be.