Nonsense. If you dispose your ewaste properly (which is in general the law) a builtin battery will get recycled or disposed of just the same as one that is replaceable.
You seem to believe that "ewaste" is something that can be "properly disposed" - you have no clue about reality or you are a marketing guy that wants to spread his lies. Maybe you are just naive and really believe the things big companies are telling you - a good follower!