I thought that myself doing business: play by „the rules“, pricing is fixed, „this does not work with this configuration and that hardware“ on a phone call - I

I thought that myself doing business: play by „the rules“, pricing is fixed, „this does not work with this configuration and that hardware“ on a phone call - I would take this as final, and so on. As I‘m now in my thirties I realized, there are no rules (well or very few). 90% of success is just showing up. „Well, you are here, let’s just have a quick talk“. It‘s not guaranteed that you get a job, a contract or something, but if your Risk is Zero, you can only win.