Yes solitude which also means loneliness can be the best tool to succeed in life because there are some things we share outside, which we thought we can get the best idea from people but end up getting nothing or not satisfy with the response we get. The best thinking has to be done in solitude because you are left we you and your mind.
We always hear something like 'follow your mind' following your mind simply means to make the decision on something within yourself, which is why using solitude as a tool is very essential.
I personally wonder how successful people do things which makes them growing, I get to know that they cherish there time being alone. It happens to me sometimes, whenever I'm going through some difficulties and I can't tell anyone about it talkless of finding solution from people around me, I will simply lock my door, sit down and start to ruminate within myself about the way out, and sincerely within a short time an idea will strike my heart which is always the positive idea.
There is a particular time I problem in solving my mathematics questions, I was alone during the time, I tried and tried. then I decided to go to the restroom, I was still there when I begin to solve the question on my head, I was happy because have tried a lot of time.
Solitude can be dangerous but when you use it as a tool which will benefit you, then you can limit the way you take your problems to people because you've gotten the solution in your lone place. Solitude can Improve Concentration and Memory, it boosts creativity and also makes one more productive.
Thanks for reading. 
