The "visualization" is one of the best features to me. You get to see all that is around and near you. If that becomes limited, your car is limited. FSD is still "want to be" software. It isn't even clear how insurers will deal with people who have problems with the "summon" feature - and hurt someone.
You can only currently get HW 3 by purchasing full self driving, that is, if you have HW2.5. I think its unlikely that your recently purchased Stealth performance has HW 2.5 so this is not something you likely need to concern yourself with. If it does, however, have HW2;5 the only current way to get HW 3.0 is to purchase FSD. IF you have HW2.5 (unlikely) and IF you wanted the new visualizations, THEN you would need to purchase FSD.... full stop. No amount of "I want HW3.0 without purchasing FSD" is likely to get tesla to change that position.
Like was said, likely nothing you have to worry about, but IF you (or anyone else) has HW2.5 and they want HW3.0 "eventually" the path forward is FSD, and that it... nothing else.