It does, but even on very smooth roads bigger wheels keep momentum better.
It's not a criticism of your design decision though, and as @MCamb pointed out it is not a concern on an E-bike anyway.
Totally agree, with you -- I'm a convert to 29ers (and even 22" BMX), but for this my priority is keeping it as small a package as possible for getting through doorways!
It does, but even on very smooth roads bigger wheels keep momentum better.
It's not a criticism of your design decision though, and as @MCamb pointed out it is not a concern on an E-bike anyway.