You can absolutely have both. In fact the galaxy S5 had both a swappable battery and IP67. Tons of devices do. Glued construction was always about reducing manufacturing costs, not about an IP rating.
There are a few phones that have removable batteries with good water resistance. No phone is completely waterproof, so I don't really care whether It can withstand 1 meter of water for 5 minutes verse 10 meters of water for an hour. It's not like I am taking my phone snorkeling.
The Samsung S5 had an IP rating of 67, which can withstand temporary submersion and had removable batteries. I frigging loved that phone.
Sony Xperia latest ones have headphone jack, IP rating for salt water, SD card, toolless sim tray and headphone jack. With a 4k screen. It's absolutely fine. Manufacturers just don't care.