Shift the focus and reframe the discussion.
All those other people are viewing this as a question of how to get your license. They think your goal is to get your license, and they're advising you on what they think the best way to do that is. It sounds like their advice may genuinely be right, too, and you're not going to convince them otherwise.
The way you'...
I don't see how following the steps is less trouble than paying 5 times as much? Because we do the same thing here.
People are supportive of things they understand, explained to them in terms that they are familiar with.
If it costs 5 times as much, find something useful and productive to spend that money on instead.
It might not be about money for you, but ...