E-bikes are very cool and I'm glad they are getting popular.
However.
There is a big difference between a crash at 12mph and one at 20mph.
Your ebike can give you injuries normally only found in motorcycle accidents. And there isn't enough advice on what constitutes sufficient maintenance for ebikes.
If you don't get balding tires fixed on a regular bike you could fall off and bruise or break a leg.
At ebike speeds that same fall will shatter your leg in dozens of pieces.
BE CAREFUL