A fuel cell is also an electrochemical system. An FCEV is also an EV. Same electric motors and everything. They can attain the same level of efficiency as a li-ion battery and not any more complex. Less complex even, if you seriously analyze the complexity of the battery pack. And because of that, it can easily displace BEVs.
I don't know your background, but your writing is that of a bullshit artist. It completely ignores basic facts and substitute BEV propaganda.