At a high level the WordPress community doesn't mesh because of having the WordPress way of doing things, and having a history of writing for old versions of PHP years after others have moved on and told users to upgrade. The WordPress community is fragmented into separate sub-communities which again don't mesh. There's the users who only build sites with page builders and hardly know how to code, those whose goal is to sell copies of their paid plugin (or hosting services), and those with permission to make changes to WordPress itself.
I've no recent experience of Drupal so can't comment on them.
My biggest takeaway is Laravel is fast to get up and going with and ship something, while Symfony actually scales and is far more easily maintainable
If I were to choose building an app I expect to last I’d choose Symfony every time