It's also much easier to access when you have a young child with a stroller.

that still doesn't explain why not go for 2nd or 3rd floor which is still very easy to handle even with small children (park pram somewhere in basement or ground floor), I am living on 5th floor without elevator with 2nd baby, so did I in previous apartment with previous child, now that's extreme, but 2nd (just bove ground floor) or 3rd floor would be just fine

higher floor you go less foot traffic (noise) around your door you have, less likely your apartment to get robbed, less street noise, less insects, less air pollution and I could go on and on, basically higher you go the better, benefits end on the top floor where possibility of thieves returns, also hot in summer and possibility of leaking roof, but at least no top neighbors noise