

Yeah. I have a small pocket knife i carry everywhere, it is stainless. I’ve had it for years, and frequently bring it in the water with me clipped to my swim suit (incase i need to cut a tangled rope). I wash it like a dish with soap and water, i use it hard and put it away wet, and it has been fine for years and years.
After all this, i took it on a single trip in salt water, it spotted with rust that night.
I also have a Sig P938 SAS which has a stainless slide. I keep that dry and oil it on occasion, and yet that one spotted with rust within a year despite me taking good care of it. Luckily sig replaced the slide but this taught me one good lesson.
Different grades of stainless make it different grades of rust resistant. Kind of like calling IP67 electronics, like the iPhone 7, “waterproof” when they can only really withstand splashing. Some can get dunked, some can’t.
You could theoretically stand on the core of a gas giant if you were superman. For a regular human, entering a gas giant would be like falling into an ever increasing atmosphere, even if you decended slowly, the pressure and turbulence would basically crush you and tear you apart into you constituent atoms long before you reached any core. The atmoshpere on earth is like the skin of an apple, just a thin lil coating on there. The atmoshphere of a gas giant is like the meat of a peach, big, thick and juicy. Reaching the core of a gas giant would be akin to trying to reach the core of our planet, except you don’t have a cold hard crust to stand on, it’s just atmo, thicker atmo with pressures exceeding the marianas trench and crazy winds and chemicals, then it gets hot af and even more pressure atmo, etc. depending on the planet there’s winds in excess of 1000mph, maybe electrified, maybe containing molten metals, etc. there’s usually a liquid bit in there on the core too. This dude does simulations of different gas giants. Here’s Uranus
https://youtu.be/rHLifi-VzSQ