An interesting read, nice to see the "published experts" do some dumb things too. After too many plans with friends went awry, I started solo hiking and probably do 50/50. I enjoy both. There are some advantages to both. The hikes with people are either a few friends, my kids or a scout group.
I see no wildlife with the scouts and go slow but those hikes are for sharing the outdoors with younger boys and their families and hoping they learn to love it like me. With the kids, it's about showing them the places I love and finding places I have not been in places we love like the ADK's or the Whites. We sometimes see some wildlife.
Solo trips are an adventure and or a time to listen to everything around me, even if it's silent and it's just the voices in my head..... (I was going to do something about soloist being the fruit in the fruit metaphors earlier in the thread)
Weekdays in the Whites or ADK's or in crappy weather will limit how many people you see, even on pretty popular places. (I've even seen just a couple of people on Washington in early October before - road closed for ice, no visibility so no train riders on a 32 degree rainy day with a bit of loose freezing rain. We saw a small group low on the Ammo and Mike Pelchat at the summit,)
If I was going to write a book on learning to feel comfortable going solo (from a man's POV, I can't do it from a women's POV) I'd offer these suggestions
Start going solo to places you know
If going to places you don't know, a person at home knowing when to expect you or a PLB is a good idea. (a whistle too)
When things start to melt, stay off the ponds and lakes
Better to carry more gear you don't need then have gear you left home and need. (not sure how some trail runners go several miles in with nothing but a water bottle, what would a severe ankle sprain do to their core temperature when they spend several hours or an overnight out )
Know your expected hazards, slot canyons and tidal wetlands have different hazards, winter hikers are unlikely to be stung by a bee and need their epi-pen, snow blindness an issue above treeline for a long time, unlikely hiking to Owl's Head, etc
Read, reread and then read your guidebook again. Solo and stupid is no way to go through life son...(or if Animal House isn't your thing, "A man's got to know his limitations."..) The more information you have the better. (expected weather, your limitations, terrain, bail out routes, etc)
Enjoy yourself but be extra aware about your surroundings