I've heard that the Taycan may be a little overly conservatively rated, which is good since its official EPA rating is so abysmally poor, but I haven't heard that about any of the other electric cars out there.
Actually, the tires
Tesla uses on their cars really aren't ECO specials and they're not slippery in the rain; they're mostly good quality Grand Touring All Season tires
with the exception of the performance models which usually have a serious high performance tire like Michelin
Pilot PS4s. For instance, the tires
that came on my Model 3 AWD, non-performance are Michelin
Primacy MXM4s. They're probably at their best in the rain and they're pretty good in the dry, although well below something like a PS4s. Where they're actually at their worst is in snow and ice although they're fine in dry and cold conditions. In any case, the tires
that Tesla uses for EPA tests are the same ones their cars are tested with by all the groups that test cars out there the same as most other cars. They are certainly not dangerous as you claim.