Because those two types of systems have mostly the same capabilities and same legal position, neither are self-driving in any way. But Tesla markets them more aggressively which could lead to a different attitude and behavior by some owners that think they have "self driving" and pay much less attention.
There is no Peugeot LDW, there is just a bunch of OEM suppliers (Bosch, TRW, Mobileye, Continental, etc.) who do that for auto companies.
So raining on Peugeot because it is somehow second tier is misleading and misinformed because the electronics you find in a Peugeot ADAS sys, you will equally find in all other mid-range vehicles in the market.
So one of those failing would be a pretty big deal because it would apply to many models across many auto brands.
Tesla had something like 31 Billion in revenue in 2020 and as an example Bosch had about 71 Billion in revenue for the same period. If there was a case to sue lawyers would be jumping on it.