I totally agree. Before I started looking seriously for my last house, I ran into a realtor who had explicit rules from one of her clients that he would only look at houses with garages that could fit his F250 Crew Cab longbed.
When I was looking for the house I have now, I told my realtor that I wanted at least a three car no smaller than 24 deep x 32 wide, and/or the space on the lot to build an additional deep 2 car. before he would show me a house, he would look at the County permit listings that showed the garage size.
I ended up with a 3 car that's 28 deep x 34 wide, and the space to build an additional garage if I so choose.
I did have to pass up some houses that I really liked, but the garages were way too small, and they were on dinky lots, so I couldn't add additional space.