Also, they couldn't go around flinging advice and counsel right and left because:
- Some people didn't listen to the Elves any more *coughcoughDenethorcoughcough*
- The Men of Middle-earth had to think through and fight their own battles. If the Elves were always there with advice, how would they learn how to think through problems of their own?
The Elves realized that they couldn't mollycoddle Men and do all their thinking for them. The Valar had done that to a degree in Valinor, and look what resulted, Rebellions, Kinslayings, and Sunderings. The Elves who remained in Middle-earth remembered what had happened, and vowed that it would never happen again. Say if the Elves did mollycoddle Men, where would the latter go if they wanted to rebel? Would they go East and ally themselves with Sauron's allies? That would be
disastrous.