Because he/she doesn't know what he's talking about. Jets will always cruise at their maximum allowed altitude except for some really short flights. In cruise t

Because he/she doesn't know what he's talking about. Jets will always cruise at their maximum allowed altitude except for some really short flights. In cruise the only thing you're fighting is aerodynamic drag (no ground friction) and climbing is the best way to reduce that. If anything electric planes using their higher thrust will even climb quicker.