dont be so sure about that if core really went and pushed LN as the end goal of 100% user utility, rather than a voluntary side service.
CLTV is the X day hold(even after LN settlement confirms)
and
CSV is the chargeback(while funds are CTLV maturing AFTER confirm)
the concept is to have atleast 200 chains/ledgers that link to eachother. yes this means public keys will be linked to social security, tax, passport, medical records. but atleast people dont have to sign 20 registration documents for 20 services/entities.
they dont need to be "vetted" for each exchange/bank/service" because all that admin is done in one go.
if people are using brainwallets (short length alphabet 'passwords' to create private keys, or bad random generators) then yes they can be hacked.
also if you re-use addresses a few times the 'randomness' of signature data can start showing a pattern.
also vanity addresses are weaker to (easier to brute force a vanity address)
which again is an issue for LN where everytime to sign a payment you are revealing a signature with the certain point of the axis, which with enough signatures can be used to find the pattern and thus find the origin point of the curve(the private key)
this is why you should never re-use addresses using normal bitcoin transactions. and why LN and other things are not completely fool proof