Thank you for taking time to share your feedback with us! There is a similar thread in the Forum regarding this topic so I’ve gone ahead and merged your post with it to consolidate feedback. I would also suggest to upvote the following thread: Prevent users from deleting tasks
In case it helps, you can set a Project with comment-only permissions to allow your colleagues to view or comment on projects without having permissions to edit them. You can learn more about it in the following guide article: Project permissions | Product guide • Asana Product Guide
Have a great week!