Pregnancy/post-partum buys for mom—necessary or cash grab?

I’m a first time mom and trying to get through this as sustainably as I can. No maternity clothes, no pregnancy pillow, etc. I used to be a baby nanny, so I feel like I have a good idea of how to get by with just the essentials for baby (car seat, bassinet I can carry up and down the stairs throughout the day and night, changing pad, sleep sack, a handful of onesies, and a wrap/sling for baby wearing).

However I feel like the pregnancy forums I read are inundated with things I’ll “need” for my own basic needs/recovery once the baby comes, and I really can’t tell if it’s just influencer garbage. Things like ice packs, witch hazel pads, nursing-friendly clothes, special panties, a nursing pillow, a spray bottle for the bathroom, etc.

I asked my mom what I’d need and she said “oh the hospital will give you mesh panties to wear, that’s basically it. You don’t really need to buy anything, it’s a rough time but you tough it out.” However my mom friends were all appalled by this and insisted I get things for my own comfort, the idea of which makes me feel super guilty on multiple levels.

Any guidance here?