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Being isolated with your thoughts and learning to be comfortable with your own independence is definitely a way to grow. If your ego depends on others validations you need to work on yourself more.
I agree with this on a general level. I feel this way about every "negative" emotion. You need to feel the full spectrum of life to appreciate the good things. I think it's vastly important to have hardships and issues in every aspect of life. >

It's so refreshing to see an opinion that validates negative emotions and hardships as valuable lessons. They have a legitimate place and a time to exist and we should learn to embrace them and grow some wisdom out of them. >

Loneliness is never a good thing. But being alone sometimes cleans your people palate. I couldn't get through a week if I didn't have at least two days where I'm seeing no one after work/the gym. >

You can be very lonely while being surrounded by 50 ppl you know. Being alone and being lonely are 2 very different things :) >

I never get lonely. I love being alone. I’m weird though, because I’m also the life of the party when I do hang out with people. I like being alone so much that I haven’t had a serious relationship in like 17 years. I’ve dated and had fuck-buddy relationships but I always have to back out when they want something more serious because I like being alone too damn much. >

This is kind of what I mean though. most people dont know what it actually is, theres some saying 'I didnt say I wanted to be alone, I said I wanted to be left alone'. There are aspects of it that make it a bit different and/or tolerable, idk its like theres a threshold. Its like saying extroverts cant be alone, introverts dont do anything, its not true. 
I mean this is like saying you cant know happiness without knowing sadness and bad times, and its kinda true but idk. 
I have a weird perspective on it I guess since I took care of my grandma in the last years of her life and saw it in a different way. >

As a wise man once said,bad things happen because of a mans inability to sit quietly in a room
Or something like that >

I went through an extremely lonely period in my early 20s, it was a mess but I still think it made me grow.
When I came out of it I felt much older and wiser than my age/my peers and I was able to get my life in order relatively quickly and overcome a few challenging situations I didn't even know I could tackle.