I think everybody is getting it wrong.
As Italian (and Ferrari fan, but that's another story) what really matters for Ferrari (and ~~Lamborghini~~ Maserati) is that they aren't mass produced, they are not an industrial product (most of them are assembled by hand) and - most of all - all of the parts are produced in Italy!
What the minister is saying is that if Ferrari can't build autonomously their own batteries - from scratch - they can't produce a real Ferrari.
Of course this is different from buying batteries from a supplier and strapping them in a mass produced car, assembled by machines.
It has nothing to do with rich people or taxes, it's just a matter of bootstrapping an entire industry from the ground up.
Of course Ferrari knows how to build electric engines, it's completely out of touch to think that one of the leading car producer in the World in terms of know how can't do what BYD does (Ferrari is the only F1 team that still manufactures all of the components of their car from the engine to the chassis and everything else)
Also what the Italian minister said has been wrongly translated.
According to Italian sources, minister Cingolani is worried that in Italy what we call "the motor valley" will have to close if forced to rebuilt itself in only 14 years (it's really a short timeframe to reconvert an entire production chain) then he also talks about the niche supercars market, not only of Italian brands like Ferrari and Maserati, but also Lamborghini and McLaren.
EDIT: Lamborghini is not an Italian brand anymore and hasn't been since 1998 when Audi bought it.
The title is misleading.