bottle trap is the best as it trap debris and also block odor from the drain pipe

if your sink get clog up, then you can open the bottle trap and clear the stuffs inside, and also you should not throw food waste to the drain pipe, that's not how the pipe designed to work

while small amount of small food debris in the size of mince garlic/onion and rice grain will not clog the drain unless you dump a bowl of it

I havent clear my sink bottle trap and toilet basin bottle trap for many years and the water still drain fast and no sign of clog

I don't think the boiling water is bad for the pvc pipe, sometime I do pour my boiling water used for cooking down to the sink drain and they never leak

If you worry about leak then put some PTFE Teflon tape at the bottle trap threaded area, every time you remove the trap cup you clean the thread and replace with new Teflon tape

For new house, usually you will use those nano coated stainless steel sink that come with their own bottle trap, mine is easy to install everything by hand and has no leak at all

I think you just worry too much on small issue