Verified answer

Intel is "old reliable".

AMD has only recently begun producing competitive (some might say: superior, for the price) CPUs.

Now: it's not always been one way or the other. AMD was a strong contender in the days of '286 and '386 CPUs

but

they've mostly been lagging behind Intel these last few decades

offering lesser CPUs, but offering them at a competitive price.

Now, they've got CPUs that beat Intel in some ways

particularly at the price points.

So: I think it's just the died-in-the-wool Intel fans

and also

the ones who can't adjust to a changing competitiveness

- they think that Intel will always be better because they used to be

that causes some to reject AMD CPUs out-of-hand.

I don't know what people you're talking to, but right now Intel is the laughing stock of the PC hardware world. They've been stuck on the 14nm process since 2015 and their current top of the line processors have been using the same microarchitecture for almost 6 years. All Intel has managed to do in that time is raise clock speeds and add more Skylake cores. Right now, every hardware vendor is facing a shortage except for Intel!.... What does that tell you?

Hopefully Intel's Brand New CEO Pat Gelsinger can turn the Titanic around. The fact that Intel is on it's 3rd CEO in 3 years should tell you something. 

Bottom Line..... Don't get PC advice from people that either aren't in the loop or they're Fanboys!