Maybe the better word to have used there is "cumbersome"? The thought process seems to be "I am used to something that was designed for short commands and high information density at a terminal; having this perspective of knowing what is possible, gdb and lldb are both cumbersome... maybe people who haven't really experienced something better wouldn't realize that", which I think is totally fair.
Aren't these tools designed such that others can build a GUI on top of them?