Yes! I do think Pack N Plays have their place. Even as a first time mother, you'll still need to bathe, poop, prepare food for yourself, deal with animals if you have them, and deal with unexpected situations in general. Before baby is mobile, I use a bouncy seat for brief containment purposes. Try bending down and unloading a dishwasher while baby wearing. ;)
I was particularly glad I had a PnP when when I would visit people's homes that weren't safe for crawling babies.