I feel like my jeweler is lying to me

I want a 2.5ct lab grown pear shaped diamond on the chonky side, ratio about 1.4-1.45, maybe 1.5. The local jeweler I spoke with said that lab diamonds are typically all cut the same ratio, and if I wanted a chubby ratio I'd need to go natural. I feel like she's trying to upsell me from lab to natural and that she's full of crap. Am I wrong?

EDIT: I am uncomfortable ordering diamonds online and want to do the curating process in person so I can see the actual stone before buying