Once again, one more “newbie” question, until you realize an account does not define the person behind it.

So, is
BTC really the ideal tool to replace banks in typical loans and mortgages, or is it only designed for big players and small-scale charity "loans" like we usually see in this forum?
Loan world isn't perfectly shaped for bitcoin at the moment. Because for the time being, if you do not pay the loan back, not much can be done, it's not really that easy. Like I just took one big huge loan from my bank, to pay all my other loans and debts, that allowed me to drop my debt from 400 dollars a month, to 170 a month, but instead of all of them be done in 12 months, it will be done in 3 years, that's not a good deal I know, but this way, I can finally live, or at least try, you can't do that with bitcoin.
However, if one day we get more legit, like legit enough that banks give it out, that means legality matters. Because when I take a loan from my bank, I give every single detail about me, my job, my home, my income, my id, my drivers license, hell when I was a kid, they even asked for my diploma. So if I do not pay them back, they can legally come to my home, and take whatever they need. If crypto becomes like that, and they give loans like that, then yeah it can be big, because in that case, they just take that money one way or another.