Take a history lesson on the marketing of the mustang. It was originally marketed as a practical, fast fun, family vehicle. It's target market was even women. The Mach-E's performance is pretty great for what it is. Saying that the Mach-E is not a mustang is like saying the Urus is not a...
I own both so obviously I'm biased. I'll say it again. They're both really great cars. Both are definitely mustangs. If you don't believe me then just call up ford and ask them.