Nursing to sleep really that bad??

Everywhere I see I keep seeing that I should avoid nursing my baby to sleep because it makes a sleep association etc. etc. but has this actually caused anyone like a great deal of trouble when it comes to teaching baby to learn to sleep independently one day? I feel like nursing to sleep or just popping a boob in baby fixes like 90% of baby problems but I keep getting this paranoia that I'm some how going to make this harder on my baby one day eventhough I keep doing it because it just makes life so much easier. I feel like it's just fear mongering but maybe I'm just not understanding how bad it can be. Would love to hear people's thoughts or experience.