Possibly / probably.
Good optics cost more.
Coated (low reflection) lenses cost more to make.
I said possibly too, because price doesn't always equate to quality.
It goes for everything, some people sell a mediocre product for top price, and people think it must be of high grade.
I bought a relatively pricey set of filters (NISI) doing so after seeing their experience in making filters for just about every type of camera on the market.
I also had a set of ebay filters (very cheap) given to me by my brother in law, he was sent them by mistake instead of the air ones he ordered, they told him to keep the Mavic Pro ones sent so he gave them to me.
I tested them side by side shooting the same thing over and over, and couldn't tell the difference . . . well, apart form the obvious improved video footage overall with filters over none.
They aren't coated with the anti reflection, so might give more lens glare when shooting towards the sun I guess, I hardly use them, but might use the ND4 for some very late light sometime (NISI set didn't have the ND4).
I just googled the Freewell 'All Day Filters' it is just a set, that supposedly covers you for any light, using one of 3 (plain) ND filters.
Looks overpriced for this, and I'm not a huge fan of the PL ones in their kit, they have limited real use unless you have loads of time to adjust / refit when shooting over water etc.
Not sure what drone you have . . .
Is one of these the set you found ?
Air . . .
DJI Mavic Air Filters All Day 8 Pack
M2P . . .
DJI MAVIC 2 PRO FILTERS - ALL DAY - 8PACK
Or is it a MP / MPP ?
They aren't sold as an all day package though by the looks.