Rather than getting fed up with conflicting advice, consider this:
Everyone that could potentially hire you will have different opinions about ‘the right way’ to go about the whole job hunting thing.
One recruiter told me his partner reads every word of a resume even if it’s five pages long, while he himself only prints page one and never looks at the rest.
I got a job with a 1 page resume, but that was an after thought: I’d already scored the second stage interview without a resume at all. That said I applied for loads and wasn’t afraid to try different things if the advice I’d followed previously wasn’t working.
Everyone in the process is a human trying to get the best outcome - treat them all, and yourself, with patience and you’ll find the winning combo for your circumstances eventually.