My opinion/vote is have the hitch installed, suck up the price tag, it is way more useful then the roof rack.
I had a flat tire that Tesla sent a flat bed, they pulled it up with my hitch.
I had someone slow bump me as I was dead stopped at a light, nothing on my car, they got a cracked facia.
My bike rack can be used on my Y or the wife's Suburban, and we have other accessories all interchangeable.
The roof rack will increase wind resistance which will increase sound and reduce efficiency. I found none to very slight reduction with the bikes hanging in back.
New photo by Rob Cossin
And if you have the need to pull a trailer, you can with ease! NOTE your wh/m will go way up and range will drop, even this light trailer had a huge effect.
tYla with trailer