Side doors?

Looking at putting in an order. Some things bother me about the gfc but it’s really the only one that I’m looking at right now due to costs and production time.

I’m trying to decide whether I want side doors. I’m
Getting one of these campers so I can lift my dog up onto the bed from inside the truck. I won’t be using a ladder. The side doors would just be for ventilation and views. I’m concerned how the doors do not zip at the bottom and could flap more in the wind. I also think $500 is slightly ridiculous to add these.

For those without doors do you find the tent shakes less in wind???