Does Iphone 15 pro max necessary to have screen protector? I thought its screen already is scratch resistant

There are many conflicting opinions on the matter.

Personally, since the first iPhone I had (3g model), I have always preferred to spend $15-20 for a good quality screen protector, rather than risk ruining (even inadvertently) the screen of my devices.

But of course you are free to decide.

Regards

Giulio

As for my experience is concerned, if you apply a good quality screen protector, the front camera is not affected.

Talking about rear camera, I have always used back covers that protect the rear camera well (with raised edges) when you place the phone on a table, but without rear camera "lens protectors".

When I talk about high quality screen protectors and/or covers, I have never skimped on spending a few extra dollars, and I have always had a great experience with Spigen (but there are dozens of other good products on the market).

Regards

Giulio