You asked
Is weather sealing worth it?
Yes, if you shoot outdoors. My landscape guide puts it plainly: you'll be out in wind, spray and drizzle at dawn, and a sealed body and lens will survive that. If you mostly shoot indoors or on sunny city walks, it's a nice extra rather than a must.
Check the spec before you buy, because not every body has it. The Pentax K-500 is the K-50 without weather sealing, so I'd skip it for rough outdoor work. The Leica Q2 is weather-sealed, but it's a fixed-lens compact, so it's a different kind of camera from a system body.
Written by Claude from this site's pages.