This is a hard one to qualify completely. There is a lot of statistical evidence that infers that greater usage of e-Scooters and e-Bikes decreases car traffic. That may not be the case in Paris (and I can definitely see that being true) but it does go against everything we know statistically.
There are other points though, "last mile" is a difficult problem, it's not solved with bicycles (they are too onerous to take on public transport, and they are a huge target of theft), it's not solved with rental bicycles either (they are usually very few and far between).
Last-mile is most likely solved with personal e-scooters as they are much more acceptable to take on public transport and can be taken inside so they are a lot less steal-able. The problem with this is that personal e-scooters are significantly less regulated than the "all-seeing-eye" rental ones which impose restrictions on speed (20kph in Sweden, personal vehicles can be modified to go 30kph, legal maximum is 25kph and personal e-scooters all go this speed -- with no slow zones anywhere)