Your question is akin to asking why are crack dealers not worried about the health of their customers.
"They sell tasty food, to keep them eating it"
or
"They mow the green to keep them golfing on it"
What business can you possibly think of tha manages to succeed without making their consumers want to consume?
If the consumption, and hence value, is high, the LTV can be maximized even if the lifetime is low.
Your question is akin to asking why are crack dealers not worried about the health of their customers.