Absolutely. I've been riding a homebrew ebike for 20 years, as a disabled person, and I can tell you that too slow is VERY dangerous
Even on a little residential street, sometimes some asshat comes squealing around the corner in a car, and you have to be able to get out of the way fast
My normal riding speed is slower than analog bike speed. I like to mosey along. But I also need to be able to scoot
jonny