Yes, the forum is mostly people's opinions or experiences. When you post a question, that is what you will get and not usually anything science-based. People post about what worked or didn't work for them and/or why they did something a certain way. What works for one person may not work for another so that is why you get so many different responses.
Personally, I don't like anyone touching my feet, so would probably never go to a podiatrist or get a pedicure. I don't like lotions or vaseline. I don't wear double socks, etc. I have some moderate callouses apparently because of the way I walk and the way my foot interacts with my shoe. If I get a blister, it is usually in the same place each time. Mostly if I feel a hotspot, I stop, take my shoes and socks off and put some tape on that spot. I try not to "keep up" with someone walking faster. For me, it has nothing to do with how soft or hard the skin on my feet is. It is more of an awareness of what works or doesn't work for me personally. Just an opinion, no science.