So to each their own but I don't intend to be ever so careless with my device that I need that the IP rating. I'm not going to intentionally submerge it. I keep it away from pools, I generally don't have it out in the rain unless absolutely necessary, I don't hold it over the toilet and if it gets dirty I clean it. But **** happens, would I like that protection? Sure, but for the price, $320 less than a Pixel 2 XL, $190 less than an S9, I'm fine with it. Wireless charging, SD storage, IP rating, all icing on the cake and a reason to charge more. I bought the Pixel 2 because I couldn't afford to spend $800 to $1000 for the big fancy phones and I won't go back to carrier devices.
And personally, as a mechanical engineer that has a discerning eye and is paid to look at the details of design I'm sorry but IMHO full HD is more than enough resolution for a phone and I don't believe very many people can tell the difference if any. I think they think so because the colors are vibrant or the tech in the display works different so because it looks different they think they can see the resolution. I don't buy that argument and I never have. I'll take better performance and battery life of a full HD screen all day long and that's what OP is giving us for a much better price than the overpriced bloated phones from the big boys.
I don't know if I'm going to get a OP6, but they have my attention because the one thing I miss is a big screen and they offer it for a fair price.