The point on the speed for me wasn't that speed as a whole doesn't matter. Speed in the language level doesn't matter.
If you do stupid shit with rails it will take 5.1 seconds and if you do stupid shit with Golang it will take 5.05 seconds. It simply doesn't matter all that much in the language/framework level for most of us.
For example: In my current job place we are using Flask for all microservices. One of the endpoints was very slow to respond and took 3 seconds. It ended up being a missing index in the DB.
Once fixed it's taking 20ms.
So, Is python slow because it's taking 20ms vs 12ms?