Nope, this redefinition isn’t necessary, it is a choice SI made. Nothing would have broken by keeping an exact relationship between amount of substance and mass, it would just have retained the interpretation of Avogadro’s constant from before 2019 (experimentally determined vs a defined constant).
Would it work for you to drive to a larger parking garage (or even better, use public transport to a larger subway or bus station) and then use some form of battery operated micro-transport type vehicle fit for your type of limitation to move around the sidewalks/bike lanes in what can then be a more compact city center?