Right. It's not 'in lieu of' but rather in addition to.

OP is going to be paying $190/month for protection from his most likey avenue of liability (the car) but in my instance for $15/month I get $1M of additional protection that follows me around in the car or in a borrowed car or in a rental car or walking my dog or anything I do without malice/criminal intent. For OP to get their hands on an extra quarter million would be peanuts just in case someone decides 'hey, OP has some bucks let's pull some stuff'.

I need to carry 300/500/300 insurance but it sounds like that's what op is describing.