On days like today (slushy, snowy, icy, etc.), YES!
I’ll start off with saying that I most likely have not hit my worst condition yet. I’m five months pregnant and definitely don’t feel like I’m physically challenged. I can still walk quite comfortably, so I don’t need that spot that’s a few meters closer. (I have to admit though that there are times I want to show off my belly just to get a seat on the train, but I am perfectly fine carrying the little extra weight and standing on my feet.)
I have no idea how I’ll be feeling in my eighth or ninth month, but I can’t imagine being too uncomfortable to walk through a parking lot yet fine enough to walk around the mall. The only reason I see is that you’d want to avoid any slips or falls as much as possible; during bad weather or if the lot is in a bad condition, that first spot definitely makes sense for pregnant women.
It’s extremely nice to be offered these perks but until I feel like I do really need it, I would feel guilty taking that seat or that parking spot. However, if that perfectly healthy young person is going to steal it… scratch that – I am a perfectly healthy young person. If you’re a perfectly healthy young person, leave the spot open for those who need it the most.