You're making a lot of strong assumptions there, many of which make me look foolish in my finances, and I think its uncalled for. You don't seem to know as much about personal finance as you think you do.
Explain to me how 1.9% financing on my car will make me pay DOUBLE... especially if I'm making extra payments? Yeah.. it won't. Also, getting a loan and getting a GOOD loan are very different things. You could have gotten a mortgage for a flat with no history... great. Was it at 4% or 15% Bit of a difference no?
Like I said, I keep a strong watch on my credit score, and have for the past 4 years. I've SEEN an increase since my car purchase with no changes to my number of inquiries, revolving credit limits/lines, or types of credit used. The only thing that's changed is I now have a 6 month longer credit history since getting my car.
You sound exactly like someone who hates loans and just needs to pay cash for everything... most likely because you or a loved one already f%*#ed their credit history in the past and don't have the capability to spend wisely. Don't throw subtle hate at people who are smart enough to use credit instruments to their advantage.