Only if you start typing your message first and then attach a picture.
Again...just my personal experience...I KNOW I’m sending a pic before I type a message typically. In that case, the app drawer is always opened for me to add it before I type a message (in the same message).
It’s only when I already start typing a message that the extra step of opening the app drawer and then opening the photos app would be needed.
I think this change is a case of the few people utilizing the app one way are complaining WAY more than the majority of the way people actually send messages, utilize iMessage apps, take photos/attach photos in iMessage, etc.
For me, I was always a “photo attacher” and not “photo taker” in iMessage. Part of the problem for me the old way that I think people are forgetting about is the pressing the photo option, while giving you access to photos, did NOT give you access to the full camera app. That was an extra step.
I’m sure Apple decided (correctly so IMHO) that people prefer to go into the full camera app the way they have it now so they can utilize all the new camera features such as portrait mode.
To me, that is probably the main reason the change was made; not to force people to use the app tray. I mean, do you really think Apple is trying to get you to use paid apps in the tray? What is the benefit to them? They added more app capabilities and need the tray to handle that.