I'd just refine it to "never ignore a GOOD recruiter".

I'd say 8 times out of 10 recruiters never do what they promised they were going to do. They'll ghost you randomly, tell you you need to urgently get your CV to them then you never hear from them again, you tell them your job requirements and they immediately send you crap that clearly isn't a good match.

I'm not going to waste my time replying to every recruiter only to have 80% of them not even give me the common courtesy I give them.

But the good ones are worth working with. They know their stuff, communicate professionally and listen to what you say.