Nope. Even though you hear not to run a stair this is the classic way pros used to run it. My dad floored for 30 years and helped me on my home. It’s not lazy it actually takes more time to set up since every piece in the beginning needs to be cut 6” apart. Once all rows are started then the full prices begin.
Although you're partly correct - starting the next row with the offcut, will get you a staircase exactly the same because the room remains a constant width, so each offcut will be the same amount longer each row. The right way to do it is either random starts, or every 2nd/3rd row offset.
I am installing this same plank in my basement. I use a scrap 2x4 to evenly distribute the pressure from the mallet across the locking mechanism. They damage very easily.
no need for glue on this application. the floor looks pristine. there is absolutely no reason this floor would fail , so glue down is a waste of time and money. for the record , no manufacturer requires glue down installation on commercial jobs. They recommend it, but don't require it. it all depends on the condition of the sub floor and the use of space. Its discretionary to the installer. also the pattern here is horrible. you never install set size boards in a stair pattern . too much waste and it looks terrible. Thats a rush job . never go more than 2 rows ahead of the other guy. use your cuts to start the next row. virtually no waste.
Laminate is always glued, vinyl needs to expand and contract hence floating floor, you can glue the thin mil cheap stuff that seems to not want to snap into place, if not the corners will lift and break...